PM5371TUDX
DATA SHEET
PMC-920525
ISSUE 6
SONET/SDH TRIBUTARY UNIT CROSS CONNECT
Pin Name Type
Pin Function
No.
D[0]
D[1]
D[2]
D[3]
D[4]
D[5]
D[6]
D[7]
A[0]
I/O
31
32
33
34
37
38
39
40
12
13
14
15
16
The bidirectional data bus (D[7:0]) is used during
TUDX register read and write accesses.
Input
The address bus (A[4:0]) selects specific registers
during TUDX register accesses.
A[1]
A[2]
A[3]
A[4]/TRS
The test register select (TRS) signal discriminates
between normal and test mode register accesses.
TRS is high during test mode register accesses, and
is low during normal mode register accesses. The
TRS input has an integral pull down resistor.
RSTB
ALE
Input
Input
104 The active low reset (RSTB) signal provides an
asynchronous TUDX reset. RSTB is a Schmitt
triggered input with an integral pull up resistor.
103 The address latch enable (ALE) is active high and
latches the address bus (A[4:0]) and TRS when low.
When ALE is high, the internal address latches are
transparent. It allows the TUDX to interface to a
multiplexed address/data bus. The ALE input has an
integral pull up resistor.
INTB
OD
Output
106 The active low interrupt (INTB) signal goes low when
a TUDX interrupt source is active. INTB returns high
when the interrupt is acknowledged via an appropriate
register access. The INTB output is an open drain
output.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
19
PMC [ PMC-SIERRA, INC ]
