SCANSTA112

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SNLS161I – DECEMBER 2002 – REVISED APRIL 2013

PIN DESCRIPTIONS (continued)

No.

Pin Name

Pins

I/O

Description

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.

6

O

TEST DATA OUTPUTS: Individual output for each of the local scan ports . These TRI-STATE

outputs have 12mA of drive current.

6

I

TEST DATA INPUTS: Individual scan data input for each of the local scan ports. This input has a

25K

Ω internal pull-up resistor.

6

O

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.

6

O

LOCAL TEST CLOCK OUTPUTS: Individual output for each of the local scan ports. These are

6

O

current.

2

I

LOCAL PASS-THROUGH INPUTS: General purpose inputs which can be driven to the backplane

a 25K

Ω internal pull-up resistor.

2

O

LOCAL PASS-THROUGH OUTPUT: General purpose outputs which can be driven from the

TRI-STATE outputs have 12mA of drive current.

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