Operating Conditions
l  operating voltage: 2.0V~5.5V
l  operating temperature: -40~105
l  ESD

HBMMIL-STD-883J Class 3A


l  EFT

EN61000-4-4 Level 4

l  Fully static 8-bit 1T 8051 core CMOS microcontroller
l  Instruction set fully compatible with MCS-51
l  Level 2 Priority interrupt configuration
Flash ROM
l  16 Kbytes Flash ROM

The APROM area can be set to the range of IAP operation to 0K/1K/2K/ all APROM through the Code Option setting item


Can used to store the user's BootLoader code.

The LDROM can be set to 0K/1K/2K/4K by Code Option setting


1K bytes independent EEPROM

write more than 100,000 times, and can be stored for 100 years at room temperature.

l  256 bytes on-chip direct access RAM
l  Additional 1792 bytes of In-chip Indirect Access RAM(XRAM)


System clock (fSYS)
l  Built-in high frequency 32 MHz oscillator (HRC)

The system clock for IC operation can be set to 32/16/8/2.66mhz @2.0~5.5V by programmer choice

In the full voltage range (2.0V~5.5V), -40 ~ 105 application environment, the frequency error is not more than ±2%

Built-in low-frequency 32 kHz oscillator (LRC):
l  used as the clock source for Base Timer and WDT and wake up STOP
l  Frequency error: across (4.0~5.5V) and (-20 ~ 85) application environment, after the register correction frequency error is not more than ±4%
Low-voltage Reset (LVR)
l   4 options of reset voltage: 4.33.7V2.9V1.9V
l  the default value can be selected by the Code Option
Flash program and simulation
l  2 - line JTAG write, simulation interface, support live simulation
Interrupts (INT)
l  Timer0~2INT0~2ADCPWMUARTSSIBase TimerTK 12 interrupt sources
l  External interrupt contains 3 interrupt vectors, 13 interrupt ports. All can set up rising edge, falling edge, dual edge interrupt.
l  Two-level interrupt priority capability
Digital Peripheral
l  GPIO: Up to 18 bidirectional independently controllable I/O ports

Independent setting of pull-up resistors

P0 and P2  port source drive capacity is controlled by four levels

All IO ports have large sink current drive capability (50mA)

l  Built-in WDT, optional clock frequency division ratio
l  Three standard 80C51 timers, Timer0, Timer1, and Timer2

Timer2 provides Capture

l  6-channel 10-bit PWM

Shared cycle, duty cycle can be adjusted separately

Can output three groups of complementary PWM waveform with dead zone at the same time

l  One independent UART communication port
l  1 UART/SPI/IIC communication interfaces (SSI)
l  Integrated with 16 * 16-bit hardware Multiplier-Divide Unit (MDU)
l  Check Sum module
Analog Peripheral

l  17-channel high sensitivity TouchKey circuit.

n  Supports low-power mode

n  Applicable to TouchKey sensor, proximity induction and other TouchKey applications featuring high requirements on sensitivity

n  Can pass 10V dynamic CS test

n  Support low-power consumption mode

n  It can realize 17 high sensitivity space touch keys and derivative functions

n  Complete development support: High-flexible touch software library, intelligent software of debugging

n  High flexibility development software library support, low development difficulty

n  Automatic debugging software support, intelligent development

l  7-channel 12-bit±2LSB ADC

n  Built-in 1.024V, 2.4V and 2.048V reference voltages

n  The ADC has four reference voltages to choose from: VDD, 1.024V, 2.4V, and 2.048V

n  1 internal channel can measure the 1/4 voltage of the power supply

n  ADC conversion can be set to complete the interrupt

Power Saving Mode
l  IDLE Mode: can be woken up by any interrupt
l  STOP Mode: can be woken up by INT0~2, Base Timer and TK.

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