
SBI Bus Serializer ASSP Telecom Standard Product Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000168, Issue 5
50
Pin Name
Type
Pin
No.
Function
access port. TDI is sampled on the rising edge of TCK.
TDI has an integral pull-up resistor.
TDO
Tristate
M2
Test Data Output.
The JTAG test data output signal,
TDO, carries test data out of the SBS 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.
TRSTB
Input
P4
Test Reset Bar.
The active low JTAG test reset signal,
TRSTB, provides an asynchronous SBS 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.
Analog Reference Resistors (2 Signals)
RES
Analog
F25
Reference Resistor Connection (RES).
An off-chip
3.16k ±1% resistor is connected between this positive
resistor reference pin, RES, and a Kelvin ground pin,
RESK. An on-chip negative feedback path will force the
0.8V VREF voltage onto RES, therefore forcing 252uA
of current to flow through the resistor.
RESK
Analog
F26
Reference Resistor Connection (RESK).
An off-chip
3.16k ±1% resistor is connected between the positive
resistor reference pin, RES, and this Kelvin ground pin,
RESK. An on-chip negative feedback path will force the
0.8V VREF voltage onto RES, therefore forcing 252uA
of current to flow through the resistor.
Analog Test Bus (2 Signals)
ATB0
Analog
M24
Analog test pin (ATB0).
This pin is used for PMC
validation and testing. This pin must be grounded.
ATB1
Analog
M23
Analog test pin (ATB1).
This pin is used for PMC
validation and testing. This pin must be grounded.
Analog High Voltage Power (8 Signals)
CSU_AVDH
Power
P23
CSU Analog Power (CSU_AVDH).
This pin should be
connected to a well-decoupled
+3.3V 5% DC supply.
AVDH[6]
AVDH[5]
AVDH[4]
AVDH[3]
AVDH[2]
AVDH[1]
AVDH[0]
Power
Y23
T23
J23
D24
E24
AB24
AC24
Analog Power (AVDH[6:0]).
These pins should be
connected to a well-decoupled +3.3V 5% DC supply.
Analog Low Voltage Power (4 Signals)