Rainbow Electronics DS3134 - Manual (Page 180)

DS3134
180 of 203
TAP Controller State Machine Figure 11.2A
Test-Logic-Reset
Upon power-up of the DS3134, the TAP controller will be in the Test-Logic-Reset state. The Instruction
register will contain the IDCODE instruction. All system logic on the DS3134 will operate normally.
Run-Test-Idle
Run-Test-Idle is used between scan operations or during specific tests. The Instruction register and Test
register will remain idle.
Select-DR-Scan
All test registers retain their previous state. With JTMS low, a rising edge of JTCLK moves the
controller into the Capture-DR state and will initiate a scan sequence. JTMS high moves the controller to
the Select-IR-SCAN state.
Test-Logic-Reset
Run-Test/Idle
Select
DR-Scan
1
0
Capture-DR
1
0
Shift-DR
0
1
Exit1-DR
1
0
Pause-DR
1
Exit2-DR
1
Update-DR
0
0
1
Select
IR-Scan
1
0
Capture-IR
0
Shift-IR
0
1
Exit1-IR
1
0
Pause-IR
0
Exit2-IR
1
Update-IR
0
0
1
0 0
1
0
1
0
1
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