CH432
Dual UART chip CH432
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SKU: KL-426-0003876
Category: Analog Switches / Multiplexers
About this item
Attribute | Value |
---|---|
Manufacturer | WCH(Jiangsu Qin Heng) |
Package | QFP44; SSOP20; |
Number of serial port expansion | 2 Serial Port |
Max Baud Rate | 4Mbps |
Control Interface | SPI/Parallel port |
Operating Voltage | 3.3V/5V |
Certification | RoHS |
Overview
The CH432 is a dual UART chip that includes two 16C550-compatible asynchronous serial ports, supports half-duplex transceiver automatic switching and IrDA infrared codec, and supports communication baud rates up to 4Mbps, it can be used for RS232 serial port expansion of MCU/embedded system, high-speed serial port with automatic hardware rate control, RS485 communication, IrDA communication, etc. The figure below is a block diagram of its general application.
Features
- Two asynchronous serial ports that are completely independent, compatible with 16C450, 16C550 and 16C552 and enhanced.
- Supports 5, 6, 7 or 8 data bits and 1 or 2 stop bits.
- Supports odd verification, even verification, no verification, blank 0, flag 1 and other verification methods.
- Programmable communication baud rate, support 115200bps and communication baud rate up to 4Mbps.
- Built-in 16-byte FIFO fist in fist out buffer, Support for 4 FIFO trigger stages.
- Support MODEM modem signals CTS, DSR, RI, DCD, DTR, RTS, can be converted to RS232 level by 75232 chip.
- Supports hardware flow control signals CTS and RTS automatic handshake and automatic transmission rate control, compatible with TL16C550C.
- Supports serial frame error detection and supports Break line interval detection.
- Support full-duplex and half-duplex serial communication, provide RTS serial port sending status signal to support RS485 transceiver automatic switching.
- Built-in SIR infrared codec, supports IrDA infrared communication from 2400bps to 115200bps baud rate.
- Built-in clock oscillator, supports crystals with a frequency range of 0.9216MHz to 32MHz,the default is 22.1184MHz crystal.
- Two microcontroller interfaces are available: 8-bit passive parallel interface at 10MB speed and SPI serial interface at 3MB/24MHz speed.
- The parallel interface consists of an 8-bit data bus, 4-bit address, 3-wire control: chip select input, write operation, and optional read operation.
- The SPI serial interface includes SPI chip select, serial clock, serial input and output, and the SPI output can be connected in parallel with the input.
- The interrupt output pin is an optional connection, active low, can be replaced by the interrupt flag bit in the Query Register.
- Support 5V or 3.3V power supply voltage, support serial low-power sleep mode.
- Available in QFP-44 and SSOP-20 lead-free packages, compatible with RoHS.
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