PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 68

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

9.8
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
JTAG Test Access Port (TAP) Signals (5)
Pin Name
A[12]
A[11]
A[10]
A[9]
A[8]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
RSTB
ALE
INTB
Pin Name
TCK
TMS
TDI
TDO
Type
Input
Schmidt
TTL
Input
Input
OD Output
Type
Input
Input
Input
Tristate
Output
Pin
No.
J3H2J4
H3G2F
1H4G3
F2E1G
4E2D1
E4
E3
D3
Pin
No.
C30
E27
F27
D18
Function
The address bus (A[12:0]) selects specific registers during
S/UNI-2488 register accesses.
The active low reset (RSTB) signal provides an asynchronous
S/UNI-2488 reset. RSTB is a Schmidt triggered input with an
integral pull-up resistor.
The address latch enable (ALE) is an active-high signal and
latches the address bus A[13:0] when low. When ALE is high,
the internal address latches are transparent. ALE allows the
S/UNI-2488 to interface to a multiplexed address/data bus.
The ALE input has an integral pull up resistor.
The active low interrupt (INTB) signal is set low when a
S/UNI-2488 enabled interrupt source is active. The S/UNI-
2488 may be enabled to report many alarms or events via
interrupts.
INTB is tri-stated when the interrupt is acknowledged via the
appropriate register access. INTB is an open drain output.
Function
The test clock (TCK) signal provides timing for test
operations that are carried out using the IEEE P1149.1 test
access port.
The test mode select (TMS) signal controls the test
operations that are carried out using the IEEE P1149.1 test
access port. TMS is sampled on the rising edge of TCK.
TMS has an integral pull up resistor.
When the S/UNI-2488 is configured for JTAG operation, the
test data input (TDI) signal carries test data into the
S/UNI-2488 via the IEEE P1149.1 test access port. TDI is
sampled on the rising edge of TCK. TDI has an integral pull
up resistor.
The test data output (TDO) signal carries test data out of the
S/UNI-2488 via the IEEE P1149.1 test access port. TDO is
updated on the falling edge of TCK. TDO is a tri-state output
that is inactive except when scanning of data is in progress.
S/UNI-2488 Telecom Standard Product Datasheet
Released
68