PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 30

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
Pad Name
ALE
INTB
JTAG Port (5 Balls)
TCK
TMS
TDI
TDO
TRSTB
Type
Input
Open Drain
Output
Input
Input
Input
Tri-state
Input
Pin No.
AL30
AN30
B14
B13
C12
C11
D14
Function
Address Latch Enable. The address latch enable signal
(ALE) is active high and latches the address bus
(A[11:0]) when it is set low. The internal address latches
are transparent when ALE is set high. ALE allows the
NSE-8G to interface to a multiplexed address/data bus.
ALE has an integral pull up resistor.
Interrupt Request Bar. The active low interrupt enable
signal (INTB) output goes low when an NSE-8G interrupt
source is active and that source is unmasked. INTB
returns high when the interrupt is acknowledged via an
appropriate register access. INTB is an open drain
output.
Test Clock. The JTAG test clock signal (TCK) provides
timing for test operations that are carried out using the
IEEE P1149.1 test access port.
Test Mode Select. The JTAG test mode select signal
(TMS) 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.
Test Data Input. The JTAG test data input signal (TDI)
carries test data into the NSE-8G via the IEEE P1149.1
test access port. TDI is sampled on the rising edge of
TCK. TDI has an integral pull-up resistor.
Test Data Output. TheJTAG test data output signal
(TDO) carries test data out of the NSE-8G via the IEEE
P1149.1 test access port. TDO is updated on the falling
edge of TCK. TDO is a tri-state output which is inactive
except when scanning of data is in progress.
Test Reset Bar. The active low JTAG test reset signal
(TRSTB) provides an asynchronous NSE-8G test access
port reset via the IEEE P1149.1 test access port. TRSTB
is a Schmitt triggered input with an integral pull-up
resistor.
Note that when TRSTB is not being used, it must be
connected to the RSTB input.
NSE-8G™ Standard Product Data Sheet
Preliminary
29