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
TDI
Input
F27
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.
TDO
Tristate
Output
D18
D28
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
which is inactive except when scanning of data is in progress.
Schmidt
TTL Input
The active low test reset (TRSTB) signal provides an
asynchronous S/UNI-2488 test access port reset via the IEEE
P1149.1 test access port. TRSTB is a Schmidt triggered input
with an integral pull up resistor. In the event that TRSTB is not
used, it must be connected to RSTB.
TRSTB
9.9
Analog Miscellaneous Signals (10)
Pin Name
Type
Pin
No.
Function
ATP[3]
ATP[2]
ATP[1]
ATP[0]
Analog
AJ18
AK18
AG2
AF3
Four analog test ports (ATP[0], ATP[1], ATP[2], ATP[3]) are
provided for production testing only. These pins must be tied
to analog ground (AVS) during normal operation. ATP[1] and
ATP[0] are the test ports for the 2488 Mbps analog circuitry,
while ATP[3] and ATP[2] are the test ports for the 777.76 MHz
LVDS analog circuitry.
C0
C1
AH18
AG18
The analog C0 and C1 pins are provided for applications that
must meet SONET/SDH jitter tolerance specifications. A 47nF
non-polarized capacitor is attached across C0 and C1 for
these applications.
Analog
When the capacitor is used, the RTYPE bit in the CRSI must
be set to logic one for proper operation. When the
capacitance is not used, these pins are left floating and the
RYPE register must be set to logic zero for proper operation.
C2
C3
AJ20
AK20
The analog C2 and C3 pins are provided for applications that
must meet SONET/SDH jitter transfer specifications. A 4.7nF
non-polarized capacitor is attached across C2 and C3 for
these applications.
Analog
When the capacitance is not used, these pins are left floating.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
41
PMC [ PMC-SIERRA, INC ]
