Intel Video Game Controller Intel Gigabit Ethernet Controllers User Manual

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Software Developer’s Manual
FLASH Memory Interface
7.2.1
Read Accesses
Upon reads to the FLASH address space, the Ethernet controller uses the TRDY# signal to insert 
target wait states until valid data can be read from the FLASH device and presented on the data 
lines. When TRDY# is asserted, the Ethernet controller drives valid data on the data lines. The 
processor master can then complete normal data read cycle by asserting IRDY# when it is ready.
Figure 7-1. FLASH Buffer Read Cycles
7.2.2
Write Accesses
The processor, as the initiator, drives the address lines AD[63:0], the command and byte enable 
lines [7:0]#, and the control lines IRDY# and FRAME#. It also provides the Ethernet controller 
with valid data immediately after asserting TRDY#. The Ethernet controller controls the TRDY# 
signal and deasserts it for a certain number of clocks until valid data is written to the FLASH 
buffer. By asserting TRDY#, the Ethernet controller signals the processor that the current data 
phase has completed.
 
CLK
FRAME#
AD
CBE#
IRDY#
TRDY#
DEVSEL#
STOP#
1
 
2
 
3
4
5
6
7
8
 
ADDRESS
 
DATA 
9
MEM-RD 
BE#s