M251/M252 Series

The series of NuMicro Family 32-bit microcontrollers based on the ARM Cortex-M23 core using ARMv8-M architecture. They provide secure memory areas to secure critical program codes. They are equipped with rich peripherals and communication interfaces, including UART, SPI, I²C, I²S, CAN, LIN, SD, SC and USB. These chips are mainly designed to realize robust IoT security applications.
All Ics are RoHS compliant.

* Status: P - mass production, S - samples, UD - under development, N - not recommended for new design.

Chip	Description	Application Flash	SRAM	Data Flash	Loader Flash	Programm. methods	Clock   frequency	Supply   voltage   [V]	Operating temperature [°C]	Package	Status *
M251EC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 19 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 11-channel PWM 9-channel 12-bit ADCs 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	TSSOP-28	P
M251FC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 15 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 9-channel PWM 7-channel 12-bit ADCs 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management:Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	TSSOP-20	P
M251ZC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 26 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 12-channel PWM 10-channel 12-bit ADCs 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	QFN-33	P
M251LC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M251LD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M251SC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 54 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M251SD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 54 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M251ZD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 26 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 20-channel PWM 10-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	QFN-33	P
M251KE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 85 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-128	P
M251LE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M251SE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 53 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M251KG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 85 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-128	P
M251LG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M251SG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 53 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M252EC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 19 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 11-channel PWM 9-channel 12-bit ADCs 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	TSSOP-28	P
M252FC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 15 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 7-channel PWM 3-channel 12-bit ADCs 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management:Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	TSSOP-20	P
M252ZC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 26 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 2 x UART, 1 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 12-channel PWM 10-channel 12-bit ADCs 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	8 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	QFN-33	P
M252LC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M252LD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M252SC2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 54 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	32 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M252SD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 54 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M252ZD2AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 26 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 2 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3) VAI (Voltage Adjustable Interface) 5-channel PDMA 20-channel PWM 10-channel 12-bit ADCs 2 x analog comparator 4 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	64 KB	12 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	QFN-33	P
M252KE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 85 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-128	P
M252LE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M252SE3AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 53 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 2 x analog comparator 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	128 KB	16 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P
M252KG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 85 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-128	P
M252LG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 41 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 12-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-48	P
M252SG6AE (4111 KB)	operating frequency up to 48 MHz programmable system clock source 2 external crystal oscillators and 3 internal RC oscillators 32-bit hardware multiplier / divider 1-region eXecute-Only-Memory ( XOM ) to secure critical program codes up to 53 I/O pins 4 x 32-bit timers RTC Watchdog interfaces: 3 x UART, 3 x USCI (Universal Serial Control Interface configured as UART, SPI or I2C), 1 x QSPI, 1 x SPI / I2S (configured as SPI or I2S), 2 x I2C, 1 x SC ( ISO-7816-3), 16/8-bits EBI VAI (Voltage Adjustable Interface) 8-channel PDMA 24-channel PWM 16-channel 12-bit ADCs 1 x 12-bit DAC 2 x analog comparator 1 x operational amplifier 8 x PSIO (Programmable Serial I/O) pins 1 x USB 2.0 FS Device with on-chip PHY (crystal-less design) 96-bit Unique ID (UID) and 128-bit Unique Customer ID (UCID) LDO regulator power management: Power-on Reset (POR), Brown-out Reset (BOR) and Low Voltage Reset (LVR) power saving modes: Idle, Power-down, and Deep Power-down	256 KB	32 KB		4 KB	ISP / ICP / IAP	Ext. crystal: 4 - 32 MHz 32.768 kHz Int. RC: 48 MHz 4.032 MHz 38.4 kHz	1.8 – 5.5	-40 – +105	LQFP-64	P