ECM1900
LEDs
There are eight general-purpose LEDs on the ECM1900. Each is wired to the FPGA (bank 66) as shown in the table below.
| LED REF DES | FPGA PIN |
|---|---|
| D3 | AF10 |
| D4 | AC14 |
| D5 | AG9 |
| D6 | AF8 |
| D7 | AH8 |
| D8 | AG8 |
| D9 | AH11 |
| D10 | AG11 |
LED Operation in HDL
The LED anodes are connected to a pull-up resistor to +3.3 V, and the cathodes wired through NMOS transistors to the FPGA I/O on Bank 66.
To operate the LEDs from FPGA gateware (HDL):
- To turn ON an LED, the corresponding FPGA pin should be at logic
1. - To turn OFF an LED, the corresponding FPGA pin should be at logic
0.