PMC-Sierra, Inc.

S/UNI-QUAD

DATASHEET

PM5349 S/UNI-QUAD

PMC-971239

ISSUE 6

SATURN USER NETWORK INTERFACE (155-QUAD)

 

 

 

13.6 JTAG Support

The S/UNI-QUAD supports the IEEE Boundary Scan Specification as described in the IEEE 1149.1 standards. The Test Access Port (TAP) consists of the five standard pins, TRSTB, TCK, TMS, TDI and TDO used to control the TAP controller and the boundary scan registers. The TRSTB input is the active-low reset signal used to reset the TAP controller. TCK is the test clock used to sample data on input, TDI and to output data on output, TDO. The TMS input is used to direct the TAP controller through its states. The basic boundary scan architecture is shown below.

Figure 17: Boundary Scan Architecture

TDI

Boundary Scan

 

Register

Device Identification

Register

Bypass

Register

Instruction

Register

and

Decode

Mux

DFF

TDO

TMS

Test

Access

Port

Controller

TRSTB

TCK

Control

Select

Tri-state Enable

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

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PMC-Sierra PM5349 manual Jtag Support, Tdo Tms, Trstb TCK, Control Select Tri-state Enable