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CH9434 - 4-UART Chip

General Description

a decoupling capacitor if short-circuited with other VDD.

The capacitance value is recommended not to be less than 0.1uF.

Internal power supply of the chip, short-circuited with other VDD.

Key Features

  • Operating voltage: 3.3V.
  • Support communication baud rate setting, with the baud rate range of 1200-4000000bps.
  • UART has an independent FIFO buffer in each direction, sending 1536 bytes and receiving 2048 bytes.
  • Four fully independent UARTs, compatible with 16C550 and enhanced.
  • Support 5/6/7/8 data bits and 1/2 stop bits.
  • UARTs support odd, even, no parity, blank 0, mark 1 and other verification methods.
  • Support the commonly used MODEM communication signals.

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Datasheet Details

Part number CH9434
Manufacturer Unknown Manufacturer
File Size 192.25 KB
Description 4-UART Chip
Datasheet download datasheet CH9434 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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CH9434 Datasheet 1 http://wch.cn 4-UART Chip CH9434 Datasheet Version: 1A http://wch.cn 1. Overview CH9434 is a SPI to 4-UART transfer chip, which provides four full duplex nine-line UARTs, and is used to extend UART for MCU/embedded system. CH9434 includes four UARTs compatible with 16C550 and supports up to 4Mbps baud rate communication. It supports up to 25-channel GPIO and provides half-duplex transceiver automatic switch pin TNOW. MCU SCS# SCK SDI SDO INT# CH9434 RXD0/TXD0/CTS0/RTS0 DTR0/DSR0/DCD0/RI0/TNOW0 RXD1/TXD1/CTS1/RTS1 DTR1/DSR1/DCD1/RI1/TNOW1 RXD2/TXD2/CTS2/RTS2 DTR2/DSR2/DCD2/RI2/TNOW2 RXD3/TXD3/CTS3/RTS3 DTR3/DSR3/DCD3/RI3/TNOW3 UART0 UART1 UART2 UART3 2. Features ● Operating voltage: 3.