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SCANSTA112
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SNLS161I –DECEMBER 2002–REVISED APRIL 2013
PIN DESCRIPTIONS (continued)
No.
Pin Name Pins I/O Description
S
(0-7)
8 I SLOT IDENTIFICATION: The configuration of these pins is used to identify (assign a unique
address to) each 'STA112 on the system backplane
OE 1 I OUTPUT ENABLE for the Local Scan Ports, active low. When high, this active-low control signal
TRI-STATEs all local scan ports on the 'STA112, to enable an alternate resource to access one or
more of the local scan chains.
TDO
(01-06)
6 O TEST DATA OUTPUTS: Individual output for each of the local scan ports . These TRI-STATE
outputs have 12mA of drive current.
TDI
(01-06)
6 I TEST DATA INPUTS: Individual scan data input for each of the local scan ports. This input has a
25KΩ internal pull-up resistor.
TMS
(01-06)
6 O TEST MODE SELECT OUTPUTS: Individual output for each of the local scan ports. TMS
n
does not
provide a pull-up resistor (which is assumed to be present on a connected TMS input, per the IEEE
1149.1 requirement) . These TRI-STATE outputs have 24mA of drive current.
TCK
(01-06)
6 O LOCAL TEST CLOCK OUTPUTS: Individual output for each of the local scan ports. These are
buffered versions of TCK
B
. These TRI-STATE outputs have 24mA of drive current.
TRST
(01-06)
6 O LOCAL TEST RESETS: A gated version of TRST
B
. These TRI-STATE outputs have 24mA of drive
current.
A0
01
, A1
01
2 I LOCAL PASS-THROUGH INPUTS: General purpose inputs which can be driven to the backplane
pin Y
B
. (Only on LSP
0
and LSP
1
. Only available when a single LSP is selected) . These inputs have
a 25KΩ internal pull-up resistor.
Y0
01
, Y1
01
2 O LOCAL PASS-THROUGH OUTPUT: General purpose outputs which can be driven from the
backplane pin A
B
. (Only on LSP
0
and LSP
1
. Only available when a single LSP is selected) . These
TRI-STATE outputs have 12mA of drive current.
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