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Product Introduction

CMS80F751x series is an 8051 core, a 1T instruction system compatible with MCS-51, and a general IO type 8-bit chip. The operating frequency can reach up to 48MHz. The MCU has the following characteristics:

? With a maximum of 32KB program area, 256B RAM space, 2KB XRAM, 1KB Data FLASH area.

? With four oscillation modes.

? It supports 3 working modes: normal, idle, and sleep, which can effectively reduce power consumption.

? Built-in low-voltage reset LVR, low-voltage detection LVD, watchdog overflow reset, window watchdog reset and other protection settings can effectively improve the reliability of system operation.

? With multiple interrupt sources such as external interrupts, timer interrupts and other peripheral interrupts, it can respond to external events in a timely manner and improve the utilization of the MCU.

? 9 timers, which can realize functions such as timing, counting, input capture, output comparison, timing wake-up, and baud rate generator.

? With hardware multiplication and division unit MDU, cyclic redundancy check unit CRC.

? LED driver module supports up to 8COM and 20SEG.

? LCD driver module supports up to 8COM and 20SEG.

? 6-channel 16-bit PWM, supports independent, complementary, and synchronous three-mode output, and has hardware brake function, dead zone control function, mask output and other functions.

? With 1 I2C, 1 SPI, and 2 UART communication modules, it can realize data transmission between the system and other devices.

? With high-precision 12-bit ADC and selectable internal reference voltage, up to 2 amplifiers, up to 2 comparators, up to 30 high sensitivity touch channels, built-in temperature sensor (TS）, and more abundant analog functions.

Products Features

◆ Compatible with MCS-51 1T Instruction System

- System clock frequency supports up to 48MHz

- Machine cycle maximum 1TSYS @ FSYS≤24MHz

- Machine cycle maximum 2TSYS @ FSYS＝48MHz

◆ Memory

- Program FLASH：32K×8Bit

- Data FLASH：1K×8Bit

- IRAM：256×8Bit

- XRAM：2K×8Bit

- Support BOOT function area,1K/2K/4K optional

- Program FLASH supports partition protection

◆ 4 Oscillation Modes

- HSI-Internal high-speed oscillator: 48MHz

- HSE-External high-speed oscillator: 8MHz/16MHz

- LSE-External low-speed oscillator: 32.768KHz

- LSI-Internal low-speed oscillator: 125KHz

◆ GPIO

- Up to 30 GPIOs

- Support pull-up/down resistor function

- Support edge (rising edge/falling edge/both edge)

interrupt

- Support wake-up function

◆ Interrupts

- Support all external port interrupts

- Up to 7 timer interrupts

- Other peripheral interrupts

◆ Timers

- WDT（watchdog timer）

- Timer0/1，Timer2，Timer3/4

- LSE Timer（Support wake up）

- WUT (wake-up timer）

- BRT（baud rate clock generation timer）

◆ Cyclic Redundancy Check Unit

- CRC16（CRC16-CCITT）

◆ Multiplication and Division Operation Unit (MDU)

- Support 32bit/16bit, 16bit/16bit, 16bit×16bit

◆ Buzzer Driver

- 50 PERCENT duty cycle, frequency can be set freely

Specifications

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