SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Table 17-462 lists some of the I/Os of the GPMC module.
| Signal Name | I/0 | Description |
|---|---|---|
| GPMC_FCLK | Internal | Functional and interface clock. Acts as the time reference. |
| gpmc_clk | O | External clock provided to the external device for synchronous operations |
| gpmc_a[26:16] | O | Address |
| gpmc_ad[15:0] | I/O | Data-multiplexed with addresses A[16:1] on memory side |
| gpmc_csx | O | Chip-select (where x = 0, or 1) |
| gpmc_advn_ale | O | Address valid enable |
| gpmc_oen_ren | O | Output enable (read access only) |
| gpmc_wen | O | Write enable (write access only) |
| gpmc_wait[1:0] | I | Ready signal from memory device. Indicates when valid burst data is ready to be read |
Figure 17-100 shows the typical connection between the GPMC module and an attached NOR Flash memory.
Figure 17-100 GPMC Connection to an External NOR Flash MemoryThe following sections demonstrate how to calculate GPMC parameters for three access types: