delay
This register is used to introduce relative delays into the generation of the master output signals. All timings are defined in cycles of the SPI REFERENCE CLOCK/ext_clk, defined in this table as SPI master ref clock.
Module Instance | Base Address | Register Address |
---|---|---|
i_qspi_qspiregs | 0xFF8D2000 | 0xFF8D200C |
Size: 32
Offset: 0xC
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
nss RW 0x0 |
btwn RW 0x0 |
||||||||||||||
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
after RW 0x0 |
init RW 0x0 |
delay Fields
Bit | Name | Description | Access | Reset |
---|---|---|---|---|
31:24 | nss |
Delay in master reference clocks for the length that the master mode chip select outputs are de-asserted between transactions. The minimum delay is always SCLK period to ensure the chip select is never re-asserted within an SCLK period. |
RW | 0x0 |
23:16 | btwn |
Delay in master reference clocks between one chip select being de-activated and the activation of another. This is used to ensure a quiet period between the selection of two different slaves and requires the transmit FIFO to be empty. |
RW | 0x0 |
15:8 | after |
Delay in master reference clocks between last bit of current transaction and deasserting the device chip select (n_ss_out). By default, the chip select will be deasserted on the cycle following the completion of the current transaction. |
RW | 0x0 |
7:0 | init |
Delay in master reference clocks between setting n_ss_out low and first bit transfer. |
RW | 0x0 |