Intel CONTROLLERS 413808 - Manual (Page 788)

Intel ® 413808 and 413812—Test Logic Unit and Testability
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
788 Order Number: 317805-001US
18.2.2.10 Select-IR-Scan State
This is a temporary controller state. Here the decision is made to enter the Capture-IR
column and initiate a scan sequence for the instruction register or to return to
Test-Logic-Reset.
All test data registers selected by the current instruction retain their previous value
during this state.
Transition to next state: When
TMS is low on the rising edge of TCK , move to
Capture-IR, else move to Test-Logic-Reset.
18.2.2.11 Capture-IR State
In this state, the shift register contained in the instruction register loads the fixed value
0000001
2
on the rising edge of TCK .
All test data registers selected by the current instruction retain their previous value
during this state. The instruction does not change while the TAP controller is in this
state.
Transition to next state: When
TMS is low on the rising edge of TCK , move to Shift-IR,
else move to Exit1-IR.
18.2.2.12 Shift-IR State
In this state, the shift register contained in the instruction register is connected
between TDI and TDO and shifts data one bit position nearer to its serial output on
each rising edge of TCK .
All test data registers selected by the current instruction retain their previous value
during this state. The instruction does not change while the TAP controller is in this
state.
Transition to next state: When
TMS is high on the rising edge of TCK , move to
Exit1-IR, else remain at Shift-IR.
18.2.2.13 Exit1-IR State
This is a temporary state.
All test data registers selected by the current instruction retain their previous value
during this state. The instruction does not change while the TAP controller is in this
state.
Transition to next state: When
TMS is high during the next rising edge of TCK , the
controller enters the Update-IR state and the scanning process terminates. When TMS
is held low during the next rising edge of TCK , the controller enters the Pause-IR state.
18.2.2.14 Pause-IR State
This state allows the TAP controller to temporarily halt the shifting of data through the
instruction register.
All test data registers selected by the current instruction retain their previous value
during this state. The instruction does not change while the TAP controller is in this
state.
Transition to next state: When
TMS is high on the rising edge of TCK , move to
Exit2-IR, else remain in the Pause-IR state.