kernel

CPU：1T 8051, 10 times faster than traditional 8051 with higher speed

Compatible with 8051 instruction set, dual DPTR working mode

memory

MTP program memory: 8KB, with over 1000 repeated erasures

EEPROM: 512 Byte， Used to store data that needs to be saved in case of power failure, with over 100000 repeated erasures

RAM: 256 Byte internal RAM, 512 Byte external RAM

Working Voltage

Working voltage: 2.7V~ 5.5V@Fosc =8MHz 

2.2V ~  5.5V@Fosc =4MHz 

Operating Temperature

Working temperature: -40 ℃~+85 ℃

clock system

External low-speed oscillator: 32.768KHz

Built in low-speed RC oscillator: 128KHz

Built in high-speed RC oscillator: 8MHz, accuracy of ± 2% @ 5V/25 ℃ (factory calibrated)

timer

Three 16 bit universal timers: Timer 0, Timer 1, Timer 2

General Purpose Input/Output Port (GPIO)

Supports up to 18 GPIO ports (different models may vary)

Supports push-pull, open drain, pull-up, pull-down, and high impedance modes

When push-pull output is used, GPIO has 4 levels of selectable push current: 12mA, 10mA, 8mA, 6mA;  @VDD=5V 

When push-pull output is used, there are 2 levels of GPIO current options: 16mA, 8mA;  @VDD=5V 

GPIO can be software simulated as a 1/2 BIAS LCD driver without the need for external resistors

TMC function

The clock source for TMC timer can be selected as IRCL or XOSCL

The minimum unit of interruption time is 512 IRCL clock cycles when IRCL is selected as the clock source, and 128 XOSCL clock cycles when XOSCL is selected as the clock source

Configurable interrupt time ranges from 1-256 minimum unit times

Interrupt system

7 valid interrupt sources

Two level interrupt priority, supporting interrupt nesting

5 external interrupt sources INT0~INT4 ➢ External interrupt trigger edge selection: INT0~1 (rising edge, falling edge), INT2~4 (rising edge, falling edge, double edge)

Interrupt input pin selection: INT0 (P0.0), INT1 (P0.1), INT2 (P0.2), INT3 (P0.3), INT4 can choose any GPIO pin other than P0.0~P0.3 as the interrupt input pin

Analog to Digital Converter (ADC)

Supports 18 channels of 12 bit SAR ADC (different models may vary)

Supports 2 types of reference voltage sources: VDD and internal reference

Selecting internal voltage as the reference, VDD voltage can be measured

Touch Key

Built in touch sensing controller, no external capacitor required

Greater support for 18 touch channels (different models may vary)

High anti-interference performance, compliant with EMC (CS dynamic 10V, EFT 4KV) standards

Support touch interruption

Support parallel touch channels, which can be used to achieve low-power mode

PWM 

Supports 4 PWM outputs, each can be individually controlled, and the cycle and duty cycle can be configured freely within the 16 bit range

Support direct output of internal clock function

Support PWM interrupt function

Each PWM output pin can be mapped to different GPIO pins

Universal Serial Interface (UART1/UART2)

Supports 2 full duplex serial ports

Support 1-byte receive cache

The TX/RX functions of UART1/UART2 can be mapped to different GPIO pins

I 2C interface

Built in 1-channel I2C interface, supports master-slave mode, and supports standard/fast/high-speed modes

The SCL/SDA function of pin 2C can be mapped to any GPIO pin

SPI interface

Built in 1 4-wire SPI interface, supporting master-slave mode ◆ Low Voltage Detection (LVD)

The detection voltage can be set to 2.2V, 2.5V, 2.7V, 3.0V, 3.3V, 3.6V, 3.9V, and 4.2V.

Low voltage reset or interrupt can be set

Reset mode

The chip supports multiple reset sources: power on/off reset, soft reset, watchdog reset, low voltage detection reset

watchdog

27 bit watchdog timer, 16 bit adjustment accuracy, configurable watchdog reset or interrupt

Program download and simulation

Support ISP and IAP

Support online simulation function

low power consumption

STOP mode, current<7uA

IDLE mode, current<33uA

◆ Packaging type: SOP20

CA51M151S4A Pin Diagram