VSC6134
Datasheet
Table 69. Microprocessor Interface Signals in the Intel Asynchronous Mode (continued)
Signal
Connection
1
Function
MPSEL
Select Intel
DTKN_RDY
INTN
Ready
Ready
INTN
Interrupt
DATA[15:0]
ADDR[11:0]
DATA[15:0]
ADDR[11:0]
Microprocessor data
Microprocessor address
Read Operation
The following figure shows a flowchart of the sequence of events for a read operation:
Figure 67. Read Operation Sequence for Intel Asynchronous Interface
Microprocessor
VSC6134
•
Place address on
ADDR[11:0]
Strobe ALE.
•
•
•
Latch Address
Read Register
Drive DATA [15:0] with
read data
•
•
Assert RDN
•
Assert RDY
•
•
Latch data
Negate RDN
•
•
Tri-state DATA[15:0]
Negate RDY
•
Start new cycle
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VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
