PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 400
![no-image](/images/no-image-200.jpg)
PM5380-BI
Manufacturer Part Number
PM5380-BI
Description
Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5380-BI.pdf
(440 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
13.13.1
Figure 31 Boundary Scan Architecture
The boundary scan architecture consists of a TAP controller, an instruction register with
instruction decode, a bypass register, a device identification register and a boundary scan
register. The TAP controller interprets the TMS input and generates control signals to load the
instruction and data registers. The instruction register with instruction decode block is used to
select the test to be executed and/or the register to be accessed. The bypass register offers a
single-bit delay from primary input, TDI to primary output, TDO. The device identification
register contains the device identification code.
The boundary scan register allows testing of board inter-connectivity. The boundary scan
register consists of a shift register place in series with device inputs and outputs. Using the
boundary scan register, all digital inputs can be sampled and shifted out on primary output,
TDO. In addition, patterns can be shifted in on primary input, TDI and forced onto all digital
outputs.
TAP Controller
The TAP controller is a synchronous finite state machine clocked by the rising edge of primary
input, TCK. All state transitions are controlled using primary input, TMS. The finite state
machine is described below.
TRSTB
TMS
TCK
TDI
Controller
Access
Test
Port
Device Identification
Control
Tri-state Enable
Select
Boundary Scan
Instruction
Register
Register
Register
Register
Decode
Bypass
and
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Mux
DFF
TDO
Released
400
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