19
19-8
Ver.0.10
JTAG
19.4 Basic Operation of JTAG
19.4.2 IR Path Sequence
Instruction code is set in the Instruction Register (JTAGIR) to select the data register to be
accessed in the subsequent DR path sequence. The IR path sequence is performed following the
procedure described below.
(1) Enter JTMS = high for a period of two JTCK cycles from "Run-Test/Idle" state to go to
"Select-IR-Scan" state.
(2) Set JTMS = low to go to "Capture-IR" state. At this time, b'110001 (fixed value) is set in the
instruction register's shift register stage.
(3) Subsequently, enter JTMS = low to go to "Shift-IR" state. In "Shift-IR" state, the value of the
shift register stage is shifted right one bit every cycle, and the data b'110001 (fixed value)
that was set in (2) is serially output from the JTDO pin. At the same time, the instruction code
serially entered from the JTDI pin is set in the shift register stage bit by bit. Because
instruction code is set in the instruction register which is comprised of 6 bits, the "Shift-IR"
state continues for a period of 6 JTCK cycles. To stop the shift operation in the middle, go to
"Pause-IR" state via temporarily "Exit1-IR" state (by setting JTMS input from high to low).
Also, to return from "Pause-IR" state, go to "Shift-IR" state via temporarily "Exit1-IR" state
(by setting JTMS input from high to low).
(4) By setting JTMS = high, go from "Shift-IR" state to "Exit1-IR" state. This completes the shift
operation.
(5) Subsequently, enter JTMS = high to go to "Update-IR" state. In "Update-IR" state, the
instruction code that was set in the instruction register's shift register stage is transferred to
the instruction register's parallel output stage and, thus, JTAG instruction decoding begins.
(6) Subsequently, enter JTMS = high to go to "Select-DR-Scan" state or JTMS = low to go to
"Run-Test/Idle" state.
Содержание M32170F3VFP
Страница 19: ...CHAPTER 1 CHAPTER 1 OVERVIEW 1 1 Outline of the 32170 1 2 Block Diagram 1 3 Pin Function 1 4 Pin Layout ...
Страница 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Страница 56: ...2 2 14 Ver 0 10 This is a blank page ...
Страница 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Страница 192: ...6 6 58 Ver 0 10 INTERNAL MEMORY 6 9 Precautions to Be Taken When Rewriting Flash Memory This is a blank page ...
Страница 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Страница 498: ...10 10 228 Ver 0 10 MULTIJUNCTION TIMERS 10 9 TOM Output related 16 bit Timer This is a blank page ...
Страница 550: ...11 11 52 Ver 0 10 A D CONVERTERS 11 4 Precautions on Using A D Converters This is a blank page ...
Страница 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Страница 710: ...14 14 16 Ver 0 10 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 746: ...16 16 20 Ver 0 10 WAIT CONTROLLER 16 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 757: ...CHAPTER 18 CHAPTER 18 OSCILLATION CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit ...
Страница 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Страница 798: ...19 19 36 Ver 0 10 JTAG 19 6 Precautions about Board Design when Connecting JTAG This is a blank page ...
Страница 830: ...21 21 24 Ver 0 10 PRELIMINARY PRELIMINARY This is a blank page ELECTRICAL CHARACTERISTICS 21 5 AC Characteristics ...
Страница 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Страница 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 837: ...Appendix 2 1 32170 Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...