μ PD44647094A-A, 44647184A-A, 44647364A-A, 44647096A-A, 44647186A-A, 44647366A-A
TAP Controller State Diagram
1
Test-Logic-Reset
0
1
1
1
0
Run-Test / Idle
1
Select-DR-Scan
0
Capture-DR
0
1
Select-IR-Scan
0
Capture-IR
0
0
Shift-DR
1
Exit1-DR
0
Pause-DR
1
Exit2-DR
1
Update-DR
1
0
0
0
Shift-IR
1
Exit1-IR
0
Pause-IR
1
Exit2-IR
1
Update-IR
1
0
0
1
0
1
0
Disabling the Test Access Port
It is possible to use this device without utilizing the TAP. To disable the TAP Controller without interfering with normal
operation of the device, TCK must be tied to V SS to preclude mid level inputs. TDI and TMS may be left open but fix
them to V DD via a resistor of about 1 k Ω when the TAP controller is not used. TDO should be left unconnected also
when the TAP controller is not used.
Data Sheet M19962EJ2V0DS
31
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