4K*16Bit OTP ROM

4*14 LCD Driver

14 I/O


CSU8RP1185E is an 8-bit CMOS single-chip MCU. It embeds a 4K × 16-bit OTP ROM, a 24-bit ADC with full differential analog signal input, a low-noise amplifier, and a 4 × 14 LCD drive. And the system calibration data can be writen to the OTP within the normal working voltage (2.5~3.6V).

The CSU8RP1185E is also highly integrated to reduce BOM cost, only 7 capacitors are required body scales solution.

8 bit RISC Core

8 bit RISC Core, and high efficiency C compiler

4K x 16-bit OTP program memory

256-byte data memory (SRAM)

Only 39 single-word instructions

8-level PC storage stack


Built-in 16 MHz oscillator

32768 Hz external oscillator (RTC) or 4 MHz to 16 MHz oscillator

Peripheral Features

14bidirectional I/O ports

1 buzzer output

2 external interrupts

4*14 LCD drives

Low-voltage detection (LVD) pin, 2.4V / 2.5V / 2.6V / 2.7V / 2.8V / 3.6V voltage provided internally for comparison

Built-in low voltage programming circuit for OTP, minimum 2.5V is supported for self-program.

Analog Features

Integrated 24-bit ADC with 1 full differential input

Integrated programmable gain amplifier (PGA)

The output rate of ADC is in the range 30Hz to 3.9KHz

Providing a charge pump inside (2.6 V, 2.8 V, 3.0 V, or 3.2 V)

Providing a voltage stabilizer for the senor and modulator inside

Built-in temperature sensor

Special Features

Power-on reset (POR)

POR and hardware reset delay timer (39 ms)

Low voltage reset (LVR)

Timer 0 — 8-bit timing counter supporting programming and pre-frequency division

Extended watchdog timer (32K WDT) — Programmable time range

Low Power Consumption

Operating current of MCU

— 500uA @ 500KHz, 3.3V in normal mode

— Less than 2μA in sleep mode

CMOS Technology

Operating voltage:

— DVDD 2.4 V to 3.6 V

— AVDD 2.4 V to 3.6 V


Electronic weighing instruments

Precision measurement and control system

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