μPD46185092B, μPD46185182B, μPD46185362B

R10DS0112EJ0200 Rev.2.00

Page 30 of 35

Nov 09, 2012

TAP Controller State Diagram

Test-Logic-Reset

Run-Test / Idle

Select-DR-Scan

Capture-DR

Capture-IR

Shift-DR

Exit1-DR

Pause-DR

Exit2-DR

Update-DR

Update-IR

Exit2-IR

Pause-IR

Exit1-IR

Shift-IR

Select-IR-Scan

0

0

0

1

0

1

1

0

0

1

0

1

1

0

0

0

0

10

10

11

1

0

1

1

0

1

0

11

Disabling the Test Access Port

It is possible to use this device without utilizing the TAP. To disable the TAP Controller without interfering with

Ω when the TAP controller is not used. TDO should be left unconnected

also when the TAP controller is not used.