Immediate Data Field Usage

Versal ACAP Technical Reference Manual (AM011)

Document ID
AM011
Release Date
2022-04-26
Revision
1.4 English

The functionality of the [IMM_DATA] field is shown in the following table. These commands can be applied to [CS_LOWER], [CS_UPPER], or both at the same time.

Table 1. Controller Command Immediate Data Field Usage
Operation [DATA_XFER] [IMM_DATA] [RX] [TX] [BUS_SEL]
Write data from [IMM_DATA] 0 Single byte to write 0 1 xx
Write [IMM_DATA] number of bytes data to TXFIFO 1 x 0 1 xx

Read [IMM_DATA] number of bytes of data from RXFIFO

The maximum number of data bytes that can be transferred at one are 228 in DMA and PIO mode

1 x 1 0 xx
Defines the number of dummy cycles 1 Dummy QSPIx_CLK clock periods 0 0 xx
Chip select setup time 0 Measured in QSPI_REF_CLK clock periods 0 0 10
Chip select hold time 0 Measured in QSPI_REF_CLK clock periods 0 0 00