Example 4:Dword Read Request
Problem: Device 3 (UnitID3) in Figure 7-6 on page 161 targets main memory with a sized (dword) read of two dwords. Start address is 0020400020h; this request is part of an ordered sequence (#9).
Figure 7-6. DMA Dword Read Targeting Main Memory
Example 4: RdSized (Dword) Request Packet Setup
(Refer to [1] in Figure 7-6 on page 161)
Command[5:0] Field (Byte 0, Bit 5:0)
This is the sized read (RdSized) command code. There are several option bits within this field (see underlined bits below). Assume dword (bit 2) and coherency (bit 0) bits are enabled; the Isoc (bit 1) and response may pass posted requests (bit 3) bits ...
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