CSU1181 chip is an 8-bit RISC architecture of high-performance microcontroller, integrated with 24 bit high resolution ADC and LCD display module, peripheral devices commonly used measuring system, only seven of capacitor, this chip has realized the working voltage (3.3 +/- 0.1 V) within the scope of any save the system calibration data to OTP,

High performance RISC CPU

8 bit single chip MCU

Built-in 4 k x 16 one-time programmable memory (OTP ROM)

256 bytes of data memory (SRAM)

Only 39 vocabulary instruction

8 storage stack



Simulation feature


Analog input 2 road,

Effective precision 24-bit resolution, 19 (PGA is 8, output rate is 32 hz)

Internal integration of programmable gain amplifier

The ADC output rate of 3.8 Hz ~ 16 KHZ

The electric charge pump

With voltage stabilizer for the sensor and the modulator


Special characteristics of the micro controller


Power on reset (POR)

On electric reset delay timer (158 ms)

With low voltage reset (as)

The Timer

- eight programmable preassigned frequency 8 bit timing counter

Extend the watchdog timer (WDT)

- programmable time range


Peripheral feature


16 bi-directional I/O port

1 road buzzer output

4 x 18 LCD driver

Can choose internal crystals or WDT crystal to cheer for the clock source

Can choose two different LCD driver waveform

Can choose different ways of bias voltage to produce

Two external interrupt

Low voltage detection (LVD) pins (internal 2.4 V, 2.5 V, 2.6 V, 2.7 V, 2.8 V, 3.2 V, 3.6 V voltage)

The built-in buffer low voltage control circuit, VDD 3.3 +/- 0.1 V can burn the