CS61584A-IL5 Cirrus Logic, Inc., CS61584A-IL5 Datasheet - Page 34

• Manufacturer Part Number: CS61584A-IL5
• Description: Interface, Dual T1/E1 Line Interface
• Manufacturer: Cirrus Logic, Inc.

10.5 Run-Test/Idle State
This is a controller state between scan operations.
Once in this state, the controller remains in the state
as long as J-TMS is held low. The instruction reg-
ister and all test data registers retain their previous
state. When J-TMS is high and a rising edge is ap-
plied to J-TCK, the controller moves to the Select-
DR state.
10.6 Select-DR-Scan State
This is a temporary controller state and the instruc-
tion does not change in this state. The test data reg-
ister selected by the current instruction retains its
previous state. If J-TMS is held low and a rising
edge is applied to J-TCK when in this state, the
controller moves into the Capture-DR state and a
scan sequence for the selected test data register is
initiated. If J-TMS is held high and a rising edge
applied to J-TCK, the controller moves to the Se-
lect-IR-Scan state.
10.7 Capture-DR State
In this state, the Boundary Scan Register captures
input pin data if the current instruction is EXTEST
or SAMPLE/PRELOAD. The instruction does not
change in this state. The other test data registers,
which do not have parallel input, are not changed.
34
1
0
Test-Logic-Reset
Run-Test/Idle
0
Figure 24. TAP Controller State Diagram
1
1
0
DS261PP5
1
Select-DR-Scan
Capture-DR
Update-DR
Pause-DR
Exit1-DR
Exit2-DR
Shift-DR
0
0
1
0
1
1
When the TAP controller is in this state and a rising
edge is applied to J-TCK, the controller enters the
Exit1-DR state if J-TMS is high or the Shift-DR
state if J-TMS is low.
10.8 Shift-DR State
In this controller state, the test data register con-
nected between J-TDI and J-TDO as a result of the
current instruction shifts data on stage toward its
serial output on each rising edge of J-TCK. The in-
struction does not change in this state. When the
TAP controller is in this state and a rising edge is
applied to J-TCK, the controller enters the Exit1-
DR state if J-TMS is high or remains in the Shift-
DR state if J-TMS is low.
10.9 Exit1-DR State
This is a temporary state. While in this state, if J-
TMS is held high, a rising edge applied to J-TCK
causes the controller to enter the Update-DR state,
which terminates the scanning process. If J-TMS is
held low and a rising edge is applied to J-TCK, the
controller enters the Pause-DR state. The test data
register selected by the current instruction retains
its previous value and the instruction does not
change during this state.
0
1
1
0
0
1
0
1
Select-IR-Scan
Capture-IR
Update-IR
Pause-IR
Exit1-IR
Exit2-IR
Shift-IR
0
0
1
0
1
1
0
1
1
0
0
CS61584A
DS261PP5