Cirrus-logic CS61584A User Manual download pdf (Page 38)

CS61584A

38 DS261PP5

DS261PP5

TCK

TMS

Controller state

TDI

Parallel Input to IR

IR shift-register

Parallel output of IR

Parallel Input to TDR

TDR shift-register

TDO enable

TDO

= Don’t care or undefined

Parallel output of TDR

Test-Logic-Reset

Run-Test/Idle

Select-DR-Scan

Capture-DR

Pause-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 26. JTAG Data Register update

CS61584A

38 DS261F1

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Cirrus-logic CS61584A User Manual Page 38