Cirrus-logic CS61584A Manual de usuario Pagina 37

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CS61584A
DS261PP5 37
DS261PP5
TCK
TMS
Controller state
TDI
IR shift-register
Parallel output of IR
Parallel Input to TDR
TDR shift-register
Parallel output of TDR
Register selected
TDO enable
TDO
Act
IDCODE New Instruction
Old data
Instruction register
Inactive ActiveInactive Inactive
= Don’t care or undefined
Parallel Input to IR
Test-Logic-Reset
Run-Test/Idle
Select-DR-Scan
Select-IR-Scan
Capture-IR
Pause-IR
Exit2-IR
Shift-IR
Exit1-IR
Update-IR
Run-Test/Idle
Exit1-IR
Shift-IR
Figure 25. JTAG Instruction Register update
CS61584A
DS261F1 37
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