MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 793
Figure 32-5. IEEE 1149.1-2001 TAP controller finite state machine
32.8.3.1 Selecting an IEEE 1149.1-2001 register
Access to the JTAGC data registers is done by loading the instruction register with any of the JTAGC
instructions while the JTAGC is enabled. Instructions are shifted in via the select-IR-scan path and loaded
in the update-IR state. At this point, all data register access is performed via the select-DR-scan path.
Test logic
reset
Run-test/idle
Select-DR-scan
Select-IR-scan
Capture-DR
Capture-IR
Shift-DR
Shift-IR
Exit1-DR
Exit1-IR
Pause-DR
Pause-IR
Exit2-DR
Exit2-IR
Update-DR
Update-IR
1
0
1
1
1
00
0
0
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
0
NOTE: The value shown adjacent to each state transition in this figure represents the value of TMS at the time
of a rising edge of TCK.
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