TABLE 2. Detailed Pin Description Table
Pin #
Name
TMSB
I/O (Note 1)
Description
(SOIC & LCC)
TTL Input w/Pull-Up Resistor
10
BACKPLANE TEST MODE SELECT: Controls sequencing
through the TAP Controller of the SCANPSC110F Bridge. Also
controls sequencing of the TAPs which are on the three (3) local
scan chains.
TDIB
TTL Input w/Pull-Up Resistor
12
13
BACKPLANE TEST DATA INPUT: All backplane scan data is
supplied to the SCANPSC110F through this input pin.
TDOB
3-STATEable,
BACKPLANE TEST DATA OUTPUT: This output drives test data
from the SCANPSC110F and the local TAPs, back toward the scan
master controller.
32 mA/64 mA Drive,
Reduced-Swing,
Output
TCKB
TTL Schmitt Trigger Input
11
9
TEST CLOCK INPUT FROM THE BACKPLANE: This is the mas-
ter clock signal that controls all scan operations of the
SCANPSC110F and of the three (3) local scan ports.
TRST
S(0–5)
TTL Input w/Pull-Up Resistor
TTL Inputs
TEST RESET: An asynchronous reset signal (active LOW) which
initializes the SCANPSC110F logic.
2, 3, 4,
5, 6, 7
SLOT IDENTIFICATION: The configuration of these six (6) pins is
used to identify (assign a unique address to) each SCANPSC110F
on the system backplane.
OE
TTL Input
1
OUTPUT ENABLE for the Local Scan Ports, active LOW. When
HIGH, this active-LOW control signal 3-STATEs all three local scan
ports on the SCANPSC110F, to enable an alternate resource to
access one or more of the three (3) local scan chains.
TDOL(1–3) 3-STATEable,
24 mA/24 mA
15,19,
24
TEST DATA OUTPUTS: Individual output for each of the three (3)
local scan ports.
Drive Outputs
TDIL(1–3) TTL Inputs w/Pull-Up
Resistors
18, 23,
27
TEST DATA INPUTS: Individual scan data input for each of the
three (3) local scan ports.
TMSL(1–3) 3-STATEable,
24 mA/24 mA
16, 20,
25
TEST MODE SELECT OUTPUTS: Individual output for each of the
three (3) local scan ports. TMSL does not provide a pull-up resistor
(which is assumed to be present on a connected TMS input, per
the IEEE 1149.1 requirement)
Drive Outputs
TCKL(1–3) 3-STATEable,
24 mA/24 mA
17, 22,
26
LOCAL TEST CLOCK OUTPUTS: Individual output for each of
the three (3) local scan ports. These are buffered versions of
TCKB.
Drive Output
VCC
Power Supply Voltage
Ground potential
8, 28
Power supply pins, 5.0V ±10%.
GND
14, 21
Power supply pins 0V.
Note 1: All pins are active HIGH unless otherwise noted.
3
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