Feature:
1. POWER ON RESET CIRCUIT: The CH9344 chip has built in power on reset circuit, which requires an external 30MHz clock signal to be provided to the x1 pin during normal operation.
2. CLOCK SIGNAL GENERATION: The clock signal can be generated through crystal stabilized oscillation through built in inverter of this module. The circuit requires a 30MHz crystal to be connected between pins x1 and X0, with X1 and x0 pins grounded to 20pF oscillating capacitor.
3. COMPLETE CIRCUIT: CH9344 chip has built in all circuits required by USB bus, including embedded USB2.0 controller and USB PHY, serial matching resistance of USB signal line, 1.5K pull up resistor required by device, etc.
4. PC CONNECTION: UD + and UD ‑ pins can be directly connected to PC or other USB host. If the fuse resistance or inductance or ESD protection device is connected in series for chip safety, the AC DC equivalent series resistance should be within 5 degrees .
5. POWER SUPPLY: The CH9344 chip and USB products can directly use 3.3V power supply output by VBUS on the USB bus after LDO stabilization. If the USB product provides a standby power supply through other power supply methods, CH9344 should also use this standby power supply to avoid 10 current backflow with the USB power supply.
Specification:
Item Type: USB to TTL Module
Material: PCB
Working Voltage: 3.3V
Features:
1. High speed USB 2.0 interface, peripheral components only require crystals and capacitors.
2. Compatible with 16C550 asynchronous serial port and enhanced.
3. Support 5, 6, 7, or 8 data bits, or 2 stop bits.
4. Support odd, even, no parity, blank 0, flag 1, and other verification methods.
5. Support RTS and CTS hardware automatic flow control.
6. Support half duplex, provide sending status, support RS485 switching, and is enabled by default.
7. Provide 12 GPI0 for arbitrary input and output.
8. Programmable communication baud rate, support 115200bps and up to 12Mbps communication baud rate.
9. Part of the IO in the 0 1 2 zone of the serial port is independently powered, support 3.3V, 2.5V, and 1.8V power supply voltages, serial port 3 supports 3.3V power supply.
10. Serial driver support: for Windows XP, for Vista, for Win7, for vin8, for Vinto, for winserver, for Linux, etc.
11. Provide LOFP 48 packaging, compatible with RoHS..
Package List:
1 x USB to TTL Module2 x 8P Single Pin Header
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