18. SERIAL PROTOCOL SELECTION
Gemini has multiprotocol support on all 4 serial ports. Serial port protocols supported are RS232, RS422 and RS485.
The below table shows the mode settings of SP336 for protocol selection:
Mode 0 | Mode 1 | Mode 2 | Protocol |
0 | 0 | 1 | RS232 |
1 | 0 | 0 | RS485 |
1 | 0 | 1 | RS422 |
Mode 0 of SP336 is always connected to Ground.
The serial protocols can either be selected by jumper setting or using software-programmable MPIO pins.
The below table shows the MPIO mappings from U2 IC to the Mode pins of SP336.
U2 Pin number | SP336 IC | Mode pin |
C1 | U4 | Mode 0 |
D2 | U4 | Mode 2 |
D1 | U5 | Mode 0 |
E3 | U5 | Mode 2 |
Last modified 1yr ago