Read Processing - Wiznet WIZ810Sio User Manual

< Control, Address and DATA Sequence Diagram >

3.2. Read processing

The READ processing is entered by driving SCSn low, followed by the Address,
the OP code, the Data Length and the Data byte on MOSI. The OP code (OP) is
defined type of the READ OP and WIRTE OP. On OP = 0x0F, the read operation is
selected. On OP = 0xF0, the write operation is selected.
In W5100S SPI mode, the Byte READ processing and the burst READ processing
are provided. The Byte READ processing takes 3 instructions which is consist of
the 8-bit OP code(0x0F),16-bit Address and 8-bit Data. Otherwise, The Burst
READ processing only takes the Data instruction after the setting of the burst
read processing. The MISO pin should be selected by driving MISO low after the
falling edge of the SCSn.
WIZ810Sio User Manual (WIZnet Co.,Ltd.)
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