JHM3802 is a SoC chip specially developed for instrumentation applications. It integrates a 32-bit RISC microprocessor and sensor analog front-end signal processing circuit including low-noise pre-amplifier with configurable gain, an 8-channel 24-bit high-resolution sigma-delta ADC, and a built-in high linearity temperature sensor.

Features

CPU characteristics

• One cycle instruction

• 32-bit high-performance RISC CPU

• Maximum operating frequency of CPU 80MHz

• The operating frequency can be adjusted from 100KHz to 80MHz

• Each interrupt has an interrupt entry, which can reduce the interrupt source query

• CPU can work at 32MHz without waiting when running in flash

• CPU runs in internal RAM to a true working frequency of 80MHz without waiting

Storage space

• 64K Byte MTP memory

• 256 Byte EEPROM

• 16K Byte SRAM can be used as data or program for fast running

Peripheral Features 

• 8 way ADC

• Noise free resolution up to 19 bits

• Sampling frequency 1KHz

• PGA inside ADC for small signal amplification

• Support multiple 1.1~72X

Others

• Individual OP

• I²C interface

• Built in PLL

• 32-bit RTC

• Segment LCD support

• 4-way independent PWM

• Internal POR

• UART interface

• Built in 4KHz OSC

• 2-way 32-bit independent Timer

• 56 GPIOs

• SPI interface

• 2 built-in LDOs

• 3232-bit WDT

• Amorphous USB1.1

• Digital Sigma Delta sound (up to 24bit)

JHM3802 Block Diagram