PM7311 pmc-sierra, PM7311 Datasheet - Page 262

• Manufacturer Part Number: PM7311
• Description: Freedm 84a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021832, Issue 2
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 place between input,
TDI and output, 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.
IDCODE
The identification instruction is used to connect the identification register between TDI and TDO.
The device's identification code can then be shifted out using the Shift-DR state.
STCTEST
The single transport chain instruction is used to test out the TAP controller and the boundary scan
register during production test. When this instruction is the current instruction, the boundary scan
register is connected between TDI and TDO. During the Capture-DR state, the device
identification code is loaded into the boundary scan register. The code can then be shifted out
output, TDO using the Shift-DR state.
INTEST
The internal test instruction is used to exercise the device's internal core logic. When this
instruction is the current instruction, the boundary scan register is connected between TDI and
TDO. During the Update-DR state, patterns shifted in on input, TDI are used to drive primary
inputs. During the Capture-DR state, primary outputs are sampled and loaded into the boundary
scan register.
FREEDM 84A1024L ASSP Telecom Standard Product Data Sheet
Released
262