RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
Pin Name
Type
Pin No.
AB13
Function
ALE
Input
The address latch enable signal (ALE)
latches the A[19:0] signals during the
address phase of a bus transaction. When
ALE is set high, the address latches are
transparent. When ALE is set low, the
address latches hold the address provided
on A[19:0].
ALE has an internal pull-up resistor.
WRB
Input
AA13
The write strobe signal (WRB) qualifies write
accesses to the AAL1gator-8 device. When
CSB is set low, the D[15:0] bus contents are
clocked into the addressed register on the
rising edge of WRB.
Note that if CSB, WRB and RDB are all low,
all chip outputs are tristated. Therefore
WRB and RDB should never be active at the
same time during functional operation.
RDB
Input
Y13
The read strobe signal (RDB) qualifies read
accesses to the AAL1gator-8 device. When
CSB is set low, the AAL1gator-8 device
drives the D[15:0] bus with the contents of
the addressed register on the falling edge of
RDB.
Note that if CSB, WRB and RDB are all low,
all chip outputs are tristated. Therefore
WRB and RDB should never be active at the
same time during functional operation.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
46
PMC [ PMC-SIERRA, INC ]
