NextPort:$EB: Difference between revisions
From SpecNext Wiki
adding port which had no entry |
adding port which had no entry |
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| Line 2: | Line 2: | ||
|Number=$EB | |Number=$EB | ||
|NumberDec=235 | |NumberDec=235 | ||
|ShortDesc= | |ShortDesc=SPI CS | ||
|Readable=Yes | |Readable=Yes | ||
|Writable=Yes | |Writable=Yes | ||
}} | }} | ||
{| class="wikitable" | |||
! Bit !! Description | |||
|- | |||
| 7 || 0 to select the fpga flash (unavailable - internal use only) | |||
|- | |||
| 3 || 0 to select pi spi 1 on the gpio pins | |||
|- | |||
| 2 || 0 to select pi spi 0 on the gpio pins | |||
|- | |||
| 1 || 0 to select sd card 1 | |||
|- | |||
| 0 || 0 to select sd card 0 | |||
|} | |||
* Only one of these bits must be 0, if not the result will be no device selected. | |||
* pi gpio must be configured for spi, see nextreg 0xa0 | |||
Revision as of 13:42, 21 February 2026
| Port Number | $EB |
|---|---|
| Decimal | 235 |
| Short desc. | SPI CS |
| Bit Mask | |
| Readable | Yes |
| Writable | Yes |
| Subsystem |
| Bit | Description |
|---|---|
| 7 | 0 to select the fpga flash (unavailable - internal use only) |
| 3 | 0 to select pi spi 1 on the gpio pins |
| 2 | 0 to select pi spi 0 on the gpio pins |
| 1 | 0 to select sd card 1 |
| 0 | 0 to select sd card 0 |
- Only one of these bits must be 0, if not the result will be no device selected.
- pi gpio must be configured for spi, see nextreg 0xa0