securelyfitz
commented
4 years ago Decision: Go with VTGT-GND-TX-RX-RTS-CTS-DTR-DSR-DCD
No RI pin.
Closed securelyfitz closed 4 years ago
securelyfitz
commented
4 years ago Decision: Go with VTGT-GND-TX-RX-RTS-CTS-DTR-DSR-DCD
No RI pin.
In order to make this consistent with many other FTx232H breakout boards, the UART header order should shuffle.
Existing boards
adafruit FT232H Breakout:
3v-5v-GND-D0-D1-D2... (3v only on the newer usbc one)
CJMCU-232H:
D0-D1-D2....D7-5v-GND
TUMPA Lite
GND-3v-3v-5v-5v-GND-D0-D1...D7
UM232H
....PU2-PU1-GND-D0-D1...D7
UM232H-B(2mm) and Shikra(2.54mm)
D1-D3-D5-D7...GND D0-D2-D4-D6...VCC
dangerous prototypes/seeed FT2232H breakout
reset next to D0; usb mini?
FT4232H and FT2232H breakout from ftdi
Nonsequential layout, expensive usb mini?
Thoughts
D0..D7 should stay in order no matter what. the CJM board has additional 5v and gnd headers, so using an adafruit harness on it is still feasible.
Since I plan on providing breakout wires with the boards, i could be convinced to do 2x5 header. I also don't know that D7 (RI) makes any sense to include, but 10 pin headers are pretty common.
proposal:
VTGT-GND-TX-RX-RTS-CTS-DTR-DSR-DCD-(RI?)
backup 2x5 proposal:
GND-RX-CTS-DSR-(RI?) VTGT-TX-RTS-DTR-DCD