CMS1621 series MCU is a memory mapping and multi-function LCD driver, working voltage 2.4V-5.5V, GPIO up to 48, built-in two-frequency buzzer, time base generator and watchdog timer, providing Four-wire serial interface, with on-chip LCD drive frequency source, multiple duty cycles and bias voltage options, and a power saving command to reduce system power consumption. Industrial standard design, can work at -25℃ to 85℃, and provide SOP24, SOP28, LQFP44 and SSOP48 packages.

> Multi-function LCD driver

> Operating voltage frequency: 2.4V-5.5V

> Working temperature: -20℃-85℃

> Supports built-in RC oscillation mode and external 32KHz chip or 256KHz frequency source input

> Optional 1/2 or 1/3 bias and 1/2, 1/3 or 1/4 duty cycle

> On-chip time base frequency source

> Built-in WDT timer

> Buzzer can choose two frequencies

> Eight time bases/watchdog timer clock sources

> One 32×4 LCD driver

> An embedded 32×4 bit display RAM memory

> Data mode and command mode instructions

> Software configuration features

> Three data access modes

> Buzzer BUZZER

> Provide VLCD pin for adjusting LCD operating voltage

> Package types: SOP24, SOP28, LQFP44, SSOP48