Typical Applications
Single chip USB to dual channel UART (RS232, RS422 or RS485).
Single chip USB to dual channel FIFO.
Single chip USB to dual channel JTAG.
Single chip USB to dual channel SPI
Single chip USB to dual channel I2C.
Single chip USB to dual channel Bit-Bang.
Single chip USB to dual combination of any of above interfaces
Single chip USB to Fast Serial Optic Interface.
Single chip USB to CPU target interface (as memory), double and independent.
[Simple Use Steps]
Led1 is the power indicator light. Once power is supplied, it remains on.
After installing your cdm21228_setup drive, default ft2232hl to usb for dual serial ports.
Using pc serial debugging software you can easily test these two serial ports.
Just use two dupont wires to cross connect the serial ports:
Adbus0 (txd) and bdbus1 (rxd)
Adbus1 (rxd) and bdbus0 (txd)
U7 (74hc573) is connected to the bdbus to drive the LED for signal indication.
Some led flashes are normal when the card is charged.
When bdbus is used as a serial and open port, the red light on led5 is always on, which is the hardware flow control indicator, which is a normal phenomenon.
The 93lc56 eeprom card is not in use, so it is indicated as a blank device.
