Tap controller state machine description, Nstruction, Egister and – Rainbow Electronics DS3131 User Manual
Page 156: Nstructions, Figure 13-1. layer 1 port ac timing diagram, 2 tap controller state machine description, Figure 12-2. tap controller state machine
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12.2
TAP Controller State Machine Description
This section details the operation of the TAP controller state machine. See
Figure 12-2
for details about
each of the states described below. The TAP controller is a finite state machine, which responds to the
logic level at JTMS on the rising edge of JTCLK.
Figure 12-2. TAP Controller State Machine
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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