PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Pin Name
Type
Pin
No.
Function
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]
Input
J3
H2
J4
The address bus (A[12:0]) selects specific registers during
S/UNI-2488 register accesses.
H3
G2
F1
H4
G3
F2
E1
G4
E2
D1
RSTB
Schmidt
TTL Input
E4
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.
ALE
Input
E3
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. It allows the
S/UNI-2488 to interface to a multiplexed address/data bus.
The ALE input has an integral pull up resistor.
INTB
OD Output D3
The active low interrupt (INTB) 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.
9.8
JTAG Test Access Port (TAP) Signals (5)
Pin Name
TCK
Type
Pin
No.
Function
Input
C30
The test clock (TCK) signal provides timing for test
operations that can be carried out using the IEEE P1149.1
test access port.
The test mode select (TMS) signal controls the test
operations that can be 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.
TMS
Input
E27
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
40
PMC [ PMC-SIERRA, INC ]
