21
21-10
Rev.1.0
JTAG
21.4 Basic Operation of the JTAG
21.4.3 DR Path Sequence
The data register that was selected during the IR path sequence prior to the DR path sequence is
operated on to inspect or set data in it. The DR path sequence is performed following the procedure
described below.
(1) Enter JTMS = high for a period of one JTCK cycle from "Run-Test/Idle" state to go to "Select-
DR-Scan" state. Which data register will be selected at this time depends on the instruction
that was set during the IR path sequence performed prior to the DR path sequence.
(2) Set JTMS = low to go to "Capture-DR" state. At this time, the result of boundary-scan test or
the fixed data defined for each register is set in the data register's shift register stage.
(3) Subsequently, enter JTMS = low to go to "Shift-DR" state. In "Shift-DR" state, the DR value
is shifted right one bit every cycle, and the data that was set in (2) is serially output from the
JTDO in. At the same time, the setup data serially entered from the JTDI pin is set in the data
register's shift register stage bit by bit. By continuing the "Shift-DR" state as long as the
number of bits of the selected data register (by entering JTMS = low), all bits of data can be
set in and read out from the shift register stage. To stop the shift operation in the middle, go
to "Pause-DR" state via temporarily "Exit1-DR" state (by setting JTMS input from high to
low). Also, to return from "Pause-DR" state, go to "Shift-DR" state via temporarily "Exit1-DR"
state (by setting JTMS input from high to low).
(4) Set JTMS = high to go from "Shift-DR" state to "Exit2-DR" state. This completes the shift
operation.
(5) Subsequently, enter JTMS = high to go to "Update-DR" state. In "Update-DR" state, the data
that was set in the data register's shift register stage is transferred to the parallel output
stage and, thus, the setup data becomes ready for use.
(6) Subsequently, enter JTMS = high to go to "Select-DR-Scan" state or JTMS = low to go to
"Run-Test/Idle" state.
Содержание 32172
Страница 20: ... This is a blank page 16 ...
Страница 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Страница 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Страница 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Страница 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Страница 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Страница 240: ...8 8 40 Rev 1 0 This is a blank page INPUT OUTPUT PORTS AND PIN FUNCTIONS 8 5 Precautions on Input Output Ports ...
Страница 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Страница 416: ...10 10 118 Rev 1 0 This is a blank page INPUT OUTPUT TIMERS 10 6 TOM Output Related 16 bit Timers ...
Страница 658: ...14 14 16 Rev 1 0 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 718: ...16 16 16 Rev 1 0 This is a blank page D A CONVERTERS 16 3 Functional Description of the D A Converters ...
Страница 766: ...18 18 22 Rev 1 0 WAIT CONTROLLER 18 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 777: ...CHAPTER 20 CHAPTER 20 OSCILLATION CIRCUIT 20 1 Oscillator Circuit 20 2 Clock Generator Circuit ...
Страница 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Страница 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Страница 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Страница 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 861: ...Appendix 2 1 M32R E Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...