FPGA Module Control Interfaces
The GMM-7550 module is controlled by several discrete signals and via I2C bus. An FPGA on the module may be configured via JTAG or SPI interface, and an SPI NOR FLASH on the module is accessible via the same SPI bus.
The table below shows the GMM-7550 module control signals available on the P5 connector, and the following subsections provides more details on each interface and control signal.
P5 Connector
| Signal | Pin | Pin | Signal |
|---|---|---|---|
| GND | 1 | 2 | GND |
| CLK3_N | 3 | 4 | IO_WB_B0 |
| CLK3_P | 5 | 6 | IO_WB_A0 |
| GND | 7 | 8 | GND |
| +2.5V | 9 | 10 | +2.5V |
| CLK2_N | 11 | 12 | rfu |
| CLK2_P | 13 | 14 | rfu |
| GND | 15 | 16 | GND |
| SER_RX_P | 17 | 18 | SER_TX_P |
| SER_RX_N | 19 | 20 | SER_TX_N |
| GND | 21 | 22 | GND |
| CLK0 | 23 | 24 | SDA |
| GND | 25 | 26 | SCL |
| SPI_CLK | 27 | 28 | GND |
| SPI_D0 | 29 | 30 | SPI_CS_N |
| SPI_D2 | 31 | 32 | SPI_D1 |
| SPI_D3 | 33 | 34 | SPI_FWD |
| CFG_FAILED_N | 35 | 36 | CFG_DONE |
| GND | 37 | 38 | GND |
| JTAG_TDI | 39 | 40 | JTAG_TDO |
| JTAG_TCK | 41 | 42 | JTAG_TMS |
| GND | 43 | 44 | GND |
| +2.5V | 45 | 46 | RSTO_N |
| OFF_N | 47 | 48 | MR_N |
| GND | 49 | 50 | GND |
| Vin | 51 | 52 | Vin |
| Vin | 53 | 54 | Vin |
| Vin | 55 | 56 | Vin |
| Vin | 57 | 58 | Vin |
| Vin | 59 | 60 | Vin |
Input Power
Vin
Discrete Control Signals
MR_N OFF_N RSTO_N
JTAG Interface (FPGA Configuration)
SPI
SPI Switch
I2C Interface
- Clock PLL
- I2C GPIO: FPGA configuration mode and SPI switch control