ISI_DATA[11:0] is the physical interface to the ISI. These bits are sampled and written to memory.
When 12-bit Grayscale mode is enabled, two memory formats are supported:
ISI_CFG2.GS_MODE = 0: two pixels per word
ISI_CFG2.GS_MODE = 1: one pixel per word
The following tables illustrate the Grayscale memory mapping
configuration for 12-bit data for both formats.
Table 5-91. ISI_CFG2.GS_MODE = 0 (two pixels
per word), with ISI_CFG1.GRAYLE = 0| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Pixel 0 [11:4] | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Pixel 0 [3:0] | – | – | – | – | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Pixel 1 [11:4] | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| Pixel 1 [3:0] | – | – | – | – | |
| | | | | | | |
Table 5-92. ISI_CFG2.GS_MODE = 0 (two pixels
per word), with ISI_CFG1.GRAYLE = 1| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Pixel 1
[11:4] | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Pixel 1
[3:0] | – | – | – | – | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Pixel 0
[11:4] | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| Pixel 0
[3:0] | – | – | – | – | |
| | | | | | | |
Table 5-93. ISI_CFG2.GS_MODE = 1 (one pixel
per word)| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Pixel 0 [11:4] | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Pixel 0 [3:0] | – | – | – | – | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| – | – | – | – | – | – | – | – | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| – | – | – | – | – | – | – | – | |
| | | | | | | |
