FOMD-ACV
Power
The devices on the FOMD-ACV require several power supplies to operate. Some are provided externally through the edge card. Some are derived from the external supply using on-board power supplies.
Fixed Supplies
| SUPPLY RAIL | VOLTAGE | TOLERANCE | SOURCE | NOTES / DEVICES |
|---|---|---|---|---|
| +VDC | +2.8v to +5.5v | Edge card | Must be clean and well-regulated. | |
| +2.5VDD | +2.5v | ± 5% | On-board switcher | FPGA PLL / Vccaux supplies |
| +1.35VDD | +1.35 | ± 5% | On-board switcher | DDR3 memory and FPGA I/O |
| +1.1VDD | +1.1 | ± 0.03v | On-board switcher | FPGA core |
| VCCBAT | +1.2 to +3.0 | Edge card | Low-current supply for FPGA volatile storage |
I/O Triples
For each Altera FPGA I/O bank, there are three relevant power supplies. We call these three supplies an I/O Triple. These triples are set according to the I/O standard(s) required for I/O on the bank. Please refer to the extensive Altera documentation for more information on which settings are required for each standard.
- VCCIO – The I/O supply and is set according to the I/O standard selected for the bank.
- VCCPD – The pre-driver voltage for the bank. It is set according to:
- If VCCIO = 3.3v, set VCCPD = 3.3v
- If VCCIO = 3.0v, set VCCPD = 3.0v
- If VCCIO ≤ 2.5v, set VCCPD = 2.5v
- VREF – This is a reference voltage required for some standards. Note that this is not required for many of the supported I/O standards.
Bank Connections
Two I/O supplies are provided on the FOMD edge card, each with a corresponding I/O Triple. Several I/O banks on the FPGA are shared among a single I/O supply on the FOMD edge card.
| FOMD SUPPLY PIN | FPGA BANKS | FPGA PINS | NOTES |
|---|---|---|---|
| VCCPGM | N/A | VCCPGM | Programming bank voltages. 1.8v, 2.5v, 3.0v, or 3.3v allowed. For Active Serial, only 3.3v is allowed. |
| VCCIO1 | 2A, 3A, 5A, 5B | VCCIO2A VCCIO3A VCCIO5A VCCIO5B | See Altera Cyclone V documentation |
| VCCPD1 | 1A, 2A, 3A, 5A, 5B | VCCPD1A2A VCCPD3A VCCPD5A VCCPD5B | Pre-driver supply for associated banks. 2.5v, 3.0v, or 3.3v allowed |
| VREF1 | 2A, 3A, 5A, 5B | VREFB2AN0 VREFB3AN0 VREFB5AN0 VREFB5BN0 | |
| VCCIO2 | 3B, 4A | VCCIO3B VCCIO4A | See Altera Cyclone V documentation |
| VCCPD2 | 3B, 4A | VCCPD3B4A | Pre-driver supply for associated banks. 2.5v, 3.0v, or 3.3v allowed |
| VREF2 | 3B, 4A | VREFB2AN0 VREFB3AN0 |