Intel
®
IXF1104 4-Port Gigabit Ethernet Media Access Controller
121
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
5.9.1
Functional Description
5.9.1.1
Read Access
Read access involves the following:
•
Detect assertion of asynchronous Read control signal and latch address
•
Generate internal Read strobe
•
Drive valid data onto processor bus
•
Assert asynchronous Ready signal for required length of time
Figure 31
shows the timing of the asynchronous interface for Read access.
5.9.1.2
Write Access
Write process involves the following:
•
Detect assertion of asynchronous Write control signal and latch address
•
Detect de-assertion of asynchronous Write control signal and latch data
•
Generate internal Write strobe
•
Assert asynchronous Ready signal for required length of time
Figure 32
shows the timing of the asynchronous interface for Write accesses.
Figure 31. Read Timing Diagram - Asynchronous Interface
T
CAS
T
CAH
T
CRR
T
CDRS
T
CDRH
T
CDRD
T
CRH
uPx_ADD[10:0]
uPx_RdN
uPx_CsN
uPx_Data[31:0]
uPx_RdyN
B5103-01