48MHz ARM Cortex-M0 32-bit CPU

 32x instruction cycles, 32-bit hardware multiplier

 32x interrupt sources, configurable 4-level interrupt priority

 Supports SWD debugging interface

 Supports bit-band

Memory

– 64KB/32KB Flash program memory

– 4KB/2KB SRAM

– Flash 1Bit ECC

Clock, reset and power management

– 2.5V - 5.5V power supply

– On-chip system powered by on-chip capacitor LDO with over-current protection

– Power-on/power-off reset (POR/PDR), 8-level programmable voltage monitor (PVD)

– Built-in 48MHz (±1%) high-speed oscillator

– Built-in low-speed oscillator 256KHz

– Built-in clock security system (CSS)

– WDT reset

DMA support

– Supported peripherals: FLASH, CRC, ADC, TK

Up to 30 high-speed IOs

– 18/26/30x multi-function bidirectional IOs, supports open-drain output

– IO equipped with built-in 30K pull-up resistor and 10K pull-down resistor

– 4 IOs can trigger edge response interrupts and wake up from low-power mode

Communication interface

– 1x SPI interface, supports up to 26Mbit/s in host mode, 1/2 master-slave mode and IIC mode

– 2 UART interfaces, supports one-way communication

– 1x UST interface, supports UART, SPI and TIMER functions

LED display control

– Supports up to 8x IOs with sink current of 150mA

– Supports the drive of common cathode LED with software, and supports the use of high-current IO as COM

– Supports the configuration of forward and reverse drive with software to increase the number of driven LEDs

– Supports the configuration of LED constant-current drive with software

LCD display controller

– Supports 4 COM x 22 SEG

– Supports scanning in ROW mode and FRAME mode

– Dynamic scanning duty: 1/1, 1/2, 1/3, 1/4

– Dynamic scanning of bias voltage: 1/2, 1/3

– Allows the software to update the graphic memory data at any time without affecting the display effect

– Supports contrast adjustment and low-power display

– Supports flashing function

– Adjustable scanning frequency (30Hz - 120Hz)

6x timers

– 3x 16-bit timers, each timer supports 1 IC/OC, which can be combined for IR control coding, and supports 3 PWM outputs

– 1x 16-bit timer (UST), supports 4 PWM outputs, dead zone control and 1 PWM stream output

– 1x watchdog timer

– 1x system timer: 24-bit auto-decreasing counter

High security

– Supports hardware encryption and decryption programs to prevent program theft

– Supports 16/32-bit CRC verification to ensure data accuracy

– Supports ECC error correction to improve reliability of program storage

Low-power mode

– Supports IDLE, STOP and SLEEP modes

– 33.7μA@SLEEP: 5V, 256KHz system clock, no other peripherals except LCD, IO waiting for wakeup by key pressing, CPU shutdown

– 7.5μA@SLEEP: 5V, IO waiting for wakeup by key pressing, all clocks off except for 256KHz clock, CPU shutdown

– 3.0μA@SLEEP: 5V, no other peripherals, IO waiting for wakeup by key pressing, all clocks off, CPU shutdown

– 3.0μA@SLEEP: 5V, waiting for wakeup by single touch key pressing, all clocks off except for 256KHz clock, CPU shutdown

– Fast wake-up time up to 24μs

Touch keys (TK)

– 18/26 IOs can be configured with touch keys

– Semi-automatic scanning mode, with parallel mode supported

– No external reference capacitor required

– Adjustable key sensitivity

– Passed dynamic and static 10V conduction test

1x 12-bit high-precision ADC

– Supports sampling rate of up to 266KSPS

– Supports 18/26 conversion channels

– Range of conversion: 0 - VvCC

96-bit unique ID (UID)

Package

– SOP20/SSOP20

– SOP28/SSOP28

– LQFP32

Industrial temperature range

– -40℃ - 105℃