参数资料
型号: PM4314
厂商: PMC-SIERRA INC
元件分类: 数字传输电路
英文描述: QUAD T1/E1 LINE INTERFACE DEVICE
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封装: 14 X 20 MM, PLASTIC, QFP-128
文件页数: 139/170页
文件大小: 823K
代理商: PM4314
PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
127
Update-IR
The update instruction register state is used to load a new instruction into the
instruction register. The new instruction must be scanned in using the Shift-IR
state. The load occurs on the falling edge of TCK.
The Pause-DR and Pause-IR states are provided to allow shifting through the
test data and/or instruction registers to be momentarily paused.
Boundary Scan Instructions
The following is an description of the standard instructions. Each instruction
selects an serial test data register path between input TDI and output TDO.
BYPASS
The bypass instruction shifts data from input TDI to output TDO with one TCK
clock period delay. The instruction is used to bypass the device.
EXTEST
The external test instruction allows testing of the interconnection to other
devices. When the current instruction is the EXTEST instruction, the boundary
scan register is placed between TDI and TDO. Primary device inputs can be
sampled by loading the boundary scan register using the Capture-DR state. The
sampled values can then be viewed by shifting the boundary scan register using
the Shift-DR state. Primary device outputs can be controlled by loading patterns
shifted in through input TDI into the boundary scan register using the Update-DR
state.
SAMPLE
The sample instruction samples all the device inputs and outputs. For this
instruction, the boundary scan register is placed between TDI and TDO. Primary
device inputs and outputs can be sampled by loading the boundary scan register
using the Capture-DR state. The sampled values can then be viewed by shifting
the boundary scan register using the Shift-DR state.
相关PDF资料
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PM4314-RI QUAD T1/E1 LINE INTERFACE DEVICE
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