SOC
CSU8RP1381D
MAIN PARAMETERS

8K*16Bit OTP ROM

4*32/6*30 LCD Driver

16 I/O

Introduction

CSU8RP1381D is an 8-bit CMOS single-chip MCU. It integrates 24-bit ADC, low-noise amplifier, LCD drive, UART interface. And the system calibration data can be writen to the OTP within the normal working voltage (2.5~3.6V).

The CSU8RP1381D is also highly integrated to reduce BOM cost, only 7 capacitors are required for body scales solution.

8 bit RISC Core

8 bit RISC Core, and high efficiency C compiler

8K x 16-bit OTP program memory

384 bytes data memory (SRAM)

Only 43 single-word instructions

8-level PC storage stack

Oscillator

Built-in 8 MHz oscillator with the precision of ±2%

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

Peripheral Features

16 bidirectional I/O ports

4 buzzer output and 3 PWM output

7 internal interrupts and 2 external interrupts

4×14 / 6×30 LCD drives

1 UART interface

Low-voltage detection (LVD) pin

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

Analog Features

Integrated 2 24-bit ADC

Built-in 1/2/4/8/64/128/256/512 PGA

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

Built-in charge pump current(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

Timer/counter 1 — 8-bit frequency divider supporting programming and pre-frequency division

Timer/counter 4 — 16-bit frequency divider supporting programming and pre-frequency division

Timer/counter 5 — 16-bit frequency divider supporting programming and pre-frequency division

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

Low Power Consumption

Operating current of MCU

— 1mA @ 4MHz, 3V in normal mode

— 10uA @ 32KHz, 3V in normal mode

— Less than 1.5μA in sleep mode

CMOS Technology

Operating voltage:

— DVDD 2.4 V to 3.6 V

— AVDD 2.4 V to 3.6 V

Applications

Electronic weighing instruments

Precision measurement and control system

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