PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
Pin Name
Type
Input
Pin
Function
No.
35
34
33
32
31
30
29
28
27
A[8]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
Address Bus (A[8:0]).This bus selects specific
registers during QDSX register accesses.
ALE
Input
8
Address Latch Enable (ALE).This signal latches
the address bus contents, A[8:0], when low,
allowing the QDSX to be interfaced to a
multiplexed address/data bus. When ALE is high,
the address latches are transparent. ALE has an
integral pull-up resistor.
INTB
Output 12
Active low Open-Drain Interrupt (INTB). This
signal goes low when an unmasked interrupt
event is detected on any of the internal interrupt
sources. Note that INTB will remain low until all
active unmasked interrupt sources are
acknowledged at their source.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
25
PMC [ PMC-SIERRA, INC ]
