Product Introduction

The CMS8S3680/69xx 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 16KB program area, 256B RAM space, 1KB XRAM, 1KB data area.

➢ With four oscillation modes.

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

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

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

➢ Digital functions can be assigned to any IO port.

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

➢ 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.

➢ It has a high-precision 12-bit ADC and can choose an internal reference voltage, 2 operational amplifiers, 2 comparators, and 1 programmable gain amplifier. Each IO can be used as the input channel of the ADC, and the analog function is more abundant.

   Product Features

◆ Compatible with MCS-51 1T command system

- The system clock frequency supports up to 48MHz

- The fastest machine cycle supports 1TSYS @FSYS≤24MHz

- The fastest machine cycle supports 2TSYS @FSYS＝48MHz

◆ Memory

- Maximum program FLASH: 16K×8Bit

- Maximum Data FLASH: 1K×8Bit

- General RAM: 256×8Bit

- General XRAM: 1K×8Bit

- Program FLASH supports partition protection

◆ 4 oscillation modes

- HSI-Internal high-speed oscillation: 48MHz

- HSE-external high-speed oscillation: 8MHz/16MHz

- LSE-external low-speed oscillation: 32.768KHz

- LSI-Internal low-speed oscillation: 125KHz

◆ Low voltage reset function（LVR）

- 1.8V/2.0V/2.5V/3.5V

◆ Low-voltage detection function（LVD）

- 2.0V/2.2V/2.4V/2.7V/3.0V/3.7V/4.0V/4.3V

◆ GPIO

- Up to 22 GPIO

- All digital functions can be assigned to any GPIO

- Both support up/down resistance function

- Both support edge (rising edge/falling edge/double edge) interrupt

- Support wake-up function

◆ Interrupt source

- Support all external port interrupts

- Up to 7 timer interrupts

- Other peripheral interrupts

◆ Timer

- WDT timer (watchdog timer)

- Up to 5 timers:

Timer0/1, Timer2, Timer3/4

- LSE Timer (Support sleep wake function)

- WUT (Wake-up timer)

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