The CMS80F261x series of MCUs are enhanced 1T 8051 Flash MCUs, which support 48MHz peripheral operation at the fastest, 24MHz core operation, working voltage 2.1V-5.5V, up to 46 GPIOs, built-in 2 analog comparators, 2 operational amplifiers, Provide 6-channel complementary PWM output with dead zone control, up to 23 channels of 12-bit ADC, 4 UART, 1 SPI, 1 I2C. Industrial standard design, can work at -40℃ to 105℃, and provideSOP28,  LQFP32, LQFP44 and LQFP48 packages.

> Enhanced 1T 8051

> Working voltage frequency: 2.1V-5.5V @Fsys=48MHz, Fcpu=24MHz

> Working temperature: -40℃-105℃

> Built-in 64KB Flash ROM (support BOOT function area, 0K/1K/2K/ 4K optional), 1KB Data Flash, 256B general RAM, 4KB general XRAM

> Support 4 different oscillation modes

> Up to 46 general-purpose GPIOs, all digital functions can be assigned to any GPIO 2 analog comparators, the offset voltage is less than 1mV 2 Operational amplifier, offset voltage less than 1mV

> up to 23 channels 12-bit ADC, built-in 1.2V reference voltage, reference voltage optional 1.2V/2.0V/2.4V/3.0V/VDD

> 5 16-bit timers, Timer2 has Capture /Compare function

> Built-in WDT timer

> Built-in LSE timer, support sleep wake-up function 4 UART serial ports, baud rate up to 1Mb/s 1 SPI, communication rate up to 6Mb/s 1 I2C, communication rate Up to 400Kb/s

> 6-channel enhanced PWM, support independent and complementary modes, and programmable dead zone delay, PWM output port can be multi-port mapping built-in low voltage reset function (LVR): 1.8V/2.0V/2.5V /3.5V Built-in low voltage detection function (LVD): 2.0V~4.6V 16 levels optional

> Buzzer BUZZER

> 96bit unique ID (UID)

> Package type:SOP28,  LQFP32, LQFP44 and LQFP48