PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
40UI. Phase wander between the two clock signals is compensated for by the
LIMIT control.
14.3 JTAG Support
The S/UNI-MPH 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 32
- Boundary Scan Architecture
Boundary Scan
Register
TDI
Device Identification
Register
Bypass
Register
Instruction
Register
and
Mux
DFF
TDO
Decode
Control
TMS
Test
Select
Access
Port
Controller
Tri-state Enable
TRSTB
TCK
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
242
PMC [ PMC-SIERRA, INC ]
