CH344 Datasheet | Unknown Manufacturer

Features l CH344Q integrates 480Mbps high-speed USB device interface, and CH344L integrates 12Mbps full-speed USB device interface. l Built-in firmware, emulate standard UART interface, used to upgrade the original serial peripheral or expand additional UART via USB. l Original serial applications are totally patible without any modification in Windows operating systems. l Supports free installation OS which built-in CDC driver or multi-functional high-speed VCP vendor driver. l Hardware full duplex UART interface, integrated independent transmit-receive buffer. l CH344Q supports munication baud rate varies from 1200bps to 6Mbps, CH344L supports munication baud rate varies from 1200bps to 230400bps. l UART supports 8 data bits, and supports odd, even and none parity. l Integrated 1024-byte RX FIFO and 512-byte TX FIFO for each UART. l Supports mon MODEM signals. l Supports CTS and RTS hardware automatic flow control. l Supports half-duplex, provides sending status TNOW, used for controlling RS485 to transmit-receive switch. l Supports up to 16-channel GPIO input and output function. l Supports RS232/RS485/RS422 interface, through external voltage conversion chip. l Built-in EEPROM used to configure the chip of VID, PID, maximum current value, vendor and CH344 Datasheet 2 product information string, etc. l Supports only 3.3V power supply. l Ro HS pliant LQFP48 lead-free package. 3. Packages CH344 Datasheet Package Body size Lead pitch Description Part No. LQFP48 7- 7mm 0.5mm 19.7mil Standard LQFP 48-pin patch CH344Q LQFP48 7- 7mm 0.5mm 19.7mil Standard LQFP 48-pin patch CH344L Note: The USB transceiver of CH344 is designed according to the built-in design of USB2.0, and it is remended that no external resistor is in series with UD+ and UD- pins. 4. Pin definitions CH344Q CH344L Pin Pin No. Pin No. Name 9,24,36, 9,24,36, 8,20,23, 8,20,23, 35,47 35,47 Pin Type POWER POWER RESET UD+ USB signal UD-...