WT21 View Datasheet(PDF) - Unspecified
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MFG CO.
'WT21' PDF : 54 Pages View PDF
7.1.5 CSPI Register Read Cycle
Burst reads have a programmable amount of padding data that is returned by the slave. 0-15
bytes are returned as defined in the BurstPadding register. Following this the Error byte is
returned followed by the data. Once the transfer has started, no further padding is needed.
A FIFO within SDIO_TOP will pre-fetch the data. The address is not retransmitted, and is auto-
updated within the slave.
The length field is transmitted if LengthFieldPresentin the Function 0 registers is set. In the
absence of a length field the CSB signal is used to indicate the end of the burst.
Figure 12: CSPI Burst Read Cycle
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