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CH340G Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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5 / 6 page DreamCity Innovations WCH CH340G Datasheet CH340 have built-in FIFO buffer, and supports simplex, half- and full-duplex asynchronous communication. The UART interface supports 1 start bit, 5-8 data bits, 1 or 2 stop bits, and odd, even, space or mark parity bits. CH340 supports common baud rates: 50, 75, 100, 110, 134.5, 150, 300, 600, 900, 1200, 1800, 2400, 3600, 4800, 9600, 14400, 19200, 28800, 33600, 38400, 56000, 57600, 76800, 115200, 128000, 153600, 230400, 460800, 921600, 1500000, 2000000 baud. Transmitter baud rate error is less than 0.3%, receiver baud rate error tolerance is at most 2%. The emulated COM port is fully functional. Compatible with most applications using the serial port, without the need of changing existing code. CH340 can be used to upgrade existing peripherals using serial ports into USB devices, or adding serial ports to a PC. With external level shifting hardware, interfaces including RS232, RS422 and RS485 can be provided. By adding infrared adapters, CH340 can be used to implement USB to SIR adapter, allowing a PC to communicate with IrDA peripheral. 5.1. Example: USB RS232 adapter The schematic above implements a USB to RS232 adapter based on CH340G and external level adapter MAX213. When implementing this regulator-less 5V board, place capacitor C2 close to the V3 pin. MAX213ECWI PN61729-S GND 10µ 10n 22p 22p 12M GND 100n 100n GND GND IC1 R4OUT 22 C1- 14 R1OUT 8 R2OUT 5 T1IN 7 T2IN 6 T3IN 20 R5OUT 19 R3IN 27 T1OUT 2 T2OUT 3 T3OUT 1 R5IN 18 C1+ 12 R3OUT 26 R2IN 4 R1IN 9 R4IN 23 V- 17 EN 24 SHDN 25 V+ 13 T4IN 21 T4OUT 28 C2+ 15 C2- 16 VCC 16 GND 1 R232 15 V3 4 XI 7 XO 8 D+ 5 D- 6 TXD 2 RXD 3 RTS# 14 DTR# 13 DCD# 12 RI# 11 DSR# 10 CTS# 9 IC2 X1 1 2 3 4 X2 1 6 2 7 3 8 4 9 5 C1 C2 C3 C4 Q1 C7 C8 GND VCC 11 10 D- D- D+ D+ RXD RXD DCD DCD RI RI DSR DSR CTS CTS TXD TXD DTR DTR RTS RTS H_TXD H_DTR H_DTR H_RTS H_RTS H_RXD H_CTS H_CTS H_DCD H_DCD H_RI H_RI H_DSR H_DSR H_RX H_TX DreamCity Innovations Page of 5 6 WCH CH340G Datasheet |
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