Product Introduction

CMS80F261x 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 64KB program area, 256B RAM space, 4KB XRAM, 1KB Non-volatile 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.

➢ Up to 10 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 modules up to 8COM and 24SEG.

➢ LCD driver modules up to 8COM and 32SEG.

➢ 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 high-precision 12-bit ADC and selectable internal reference voltage, up to 2 operational amplifiers, up to 2 comparators, and more abundant analog functions.

Products Features

◆ Fully compatible with standard 8051 instruction set

- 48MHz maximum operating frequency

- Machine cycle maximum 1TSYS @ FSYS≤24MHz

- Machine cycle maximum 2TSYS @ FSYS＝48MHz

◆ Memories

- Program FLASH：64K×8Bit

- Data FLASH：1K×8Bit

- IRAM：256×8Bit

- XRAM：4K×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 crystal oscillator: 8MHz/16MHz

- LSE-External low speed crystal oscillator:32.768KHz

- LSI-Internal low speed oscillator:125KHz

◆ GPIO

- Up to 46 GPIOs

- All pins support up/down resistor function

- Interrupts generated on rising, falling, or both edges

- Support wake up from idle and sleep mode

◆ Interrupts

- All external port interrupts

- 7 timers interrupts

- Other peripheral interrupts

◆ Timers

- WDT（Watchdog timer）

- Timer0/1，Timer2，Timer3/4

- LSE Timer（Support wake up）

- WUT（wake-up timer）

- BRT/ BRT1（Baud rate clock generation timer）

◆ Cyclic redundancy check unit

- CRC16（CRC16-CCITT）

Specifications

Actual product photos

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