User Manual

TCK
TMS
Controller state
TDI
Parallel Input to IR
IR shift-register
Parallel output of IR
Parallel Input to TDR
TDR shift-register
Register Selected
TDO enable
TDO
= Don't care or undefined
Parallel output of TDR
Test-Logic-Reset
Run-Test/Idle
Select-DR-Scan Select-DR-Scan
Capture-DR
Pouse-DR
Exit2-DR
Shift-DR
Update-DR
Run-Test/Idle
Exit1-DR
Shift-DR
Exit1-DR
Select-IR-Scan
IDCODEInstruction
Old data
Test data register
New data
Inactive ActiveInactive InactiveActive
Figure 14. JTAG Data Register Update
CS61583
22 DS172PP5