TIMER B
6–24
7751 Group User’s Manual
6.5 Pulse period/pulse width measurement mode
6.5.3 Operation in pulse period/pulse width measurement mode
➀
When the count start bit is set to “1,” the counter starts counting of the count source.
➁
The counter value is transferred to the reload register when an valid edge of the measurement pulse
is detected. (Refer to section “(1) Pulse period/pulse width measurement.”)
➂
The counter value is cleared to “0000
16
” after the transfer in
➁
, and the counter continues counting.
➃
The timer Bi interrupt request bit is set to “1” when the counter value is cleared to “0000
16
” in
➂
(Note).
The interrupt request bit remains set to “1” until the interrupt request is accepted or the interrupt request
bit is cleared to “0” by software.
➄
The timer repeats operations
➁
to
➃
above.
Note: The timer Bi interrupt request does not occur when the first valid edge is input after the timer starts
counting.
(1) Pulse period/pulse width measurement
The measurement mode select bits (bits 2 and 3 at addresses 5B
16
to 5D
16
) specify whether the pulse
period of an external signal is measured or its pulse width is done. Table 6.5.3 lists the relationship
between the measurement mode select bits and the pulse period/pulse width measurements.
Make sure that the measurement pulse interval from the falling to the rising, and from the rising to
the falling are two cycles of the count source or more. Additionally, use software to identify whether
the measurement result indicates the “H” level or the “L” level width.
Table 6.5.3 Relationship between measurement mode select bits and pulse period/pulse width measurements
b3
0
0
1
1
Pulse period/pulse width measurement
Pulse period measurement
Pulse width measurement
Not selected
Measurement interval (Valid edges)
From falling to falling (Falling)
From rising to rising (Rising)
From falling to rising, and from rising to falling
(Falling and rising)
b2
0
1
0
1
Содержание 7700 FAMILY
Страница 2: ...MITSUBISHI 16 BIT SINGLE CHIP MICROCOMPUTER 7700 FAMILY 7751 SERIES 7751 Group User s Manual...
Страница 11: ...Table of Contents viii 7751 Group User s Manual MEMORANDUM...
Страница 12: ...CHAPTER 1 DESCRIPTION 1 1 Performance overview 1 2 Pin configuration 1 3 Pin description 1 4 Block diagram...
Страница 48: ...CHAPTER 3 INPUT OUTPUT PINS 3 1 Programmable I O ports 3 2 I O pins of internal peripheral devices...
Страница 157: ...TIMER B 6 28 7751 Group User s Manual 6 5 Pulse period pulse width measurement mode MEMORANDUM...
Страница 245: ...7751 Group User s Manual 8 36 A D CONVERTER Precautions when using A D converter MEMORANDUM...
Страница 246: ...CHAPTER 9 WATCHDOG TIMER 9 1 Block description 9 2 Operation description 9 3 Precautions when using watchdog timer...
Страница 254: ...CHAPTER 10 STOP MODE 10 1 Clock generating circuit 10 2 Operation description 10 3 Precautions for Stop mode...
Страница 260: ...CHAPTER 11 WAIT MODE 11 1 Clock generating circuit 11 2 Operation description 11 3 Precautions for Wait mode...
Страница 265: ...7751 Group User s Manual WAIT MODE 11 6 11 3 Precautions for Wait mode MEMORANDUM...
Страница 289: ...CONNECTION WITH EXTERNAL DEVICES 12 4 Hold function 7751 Group User s Manual 12 24 MEMORANDUM...
Страница 290: ...CHAPTER 13 RESET 13 1 Hardware reset 13 2 Software reset...
Страница 302: ...CHAPTER 14 CLOCK GENERATING CIRCUIT 14 1 Oscillation circuit example 14 2 Clock...
Страница 307: ...CLOCK GENERATING CIRCUIT 7751 Group User s Manual 14 6 14 2 Clock MEMORANDUM...
Страница 359: ...ELECTRICAL CHARACTERISTICS 7751 Group User s Manual 15 52 MEMORANDUM 15 15 Testing circuit for ports P0 to P8 1 and E...
Страница 360: ...CHAPTER 16 STANDARD CHARACTERISTICS 16 1 Standard characteristics...
Страница 365: ...STANDARD CHARACTERISTICS 16 1 Standard characteristics 7751 Group User s Manual 16 6 MEMORANDUM...
Страница 366: ...CHAPTER 17 APPLICATIONS 17 1 Memory expansion...
Страница 405: ...APPLICATIONS 7751 Group User s Manual 17 40 17 1 Memory expansion MEMORANDUM...
Страница 406: ...CHAPTER 18 PROM VERSION 18 1 EPROM mode 18 2 Usage precaution...
Страница 417: ...7751 Group User s Manual PROM VERSION 18 12 18 2 Usage precaution MEMORANDUM...
Страница 418: ...CHAPTER 19 FLASH MEMORY VERSION 19 1 Parallel input output mode 19 2 Serial input output mode...
Страница 451: ...FLASH MEMORY VERSION 7751 Group User s Manual 19 34 19 2 Serial input output mode MEMORANDUM...
Страница 483: ...APPENDIX 7751 Group User s Manual 20 32 Appendix 4 Package outlines Appendix 4 Package outlines 80P6N A...
Страница 484: ...APPENDIX 7751 Group User s Manual 20 33 Appendix 4 Package outlines 80D0...
Страница 489: ...APPENDIX 7751 Group User s Manual 20 38 Appendix 6 Hexadecimal instruction code table...
Страница 490: ...APPENDIX 7751 Group User s Manual 20 39 Appendix 6 Hexadecimal instruction code table...
Страница 491: ...APPENDIX 7751 Group User s Manual 20 40 Appendix 7 Machine instructions Appendix 7 Machine instructions...
Страница 492: ...APPENDIX 7751 Group User s Manual 20 41 Appendix 7 Machine instructions...
Страница 493: ...APPENDIX 7751 Group User s Manual 20 42 Appendix 7 Machine instructions...
Страница 494: ...APPENDIX 7751 Group User s Manual 20 43 Appendix 7 Machine instructions...
Страница 495: ...APPENDIX 7751 Group User s Manual 20 44 Appendix 7 Machine instructions...
Страница 496: ...APPENDIX 7751 Group User s Manual 20 45 Appendix 7 Machine instructions...
Страница 497: ...APPENDIX 7751 Group User s Manual 20 46 Appendix 7 Machine instructions...
Страница 498: ...APPENDIX 7751 Group User s Manual 20 47 Appendix 7 Machine instructions...
Страница 499: ...APPENDIX 7751 Group User s Manual 20 48 Appendix 7 Machine instructions...
Страница 500: ...APPENDIX 7751 Group User s Manual 20 49 Appendix 7 Machine instructions...
Страница 501: ...APPENDIX 7751 Group User s Manual 20 50 Appendix 7 Machine instructions...
Страница 502: ...APPENDIX 7751 Group User s Manual 20 51 Appendix 7 Machine instructions...
Страница 503: ...APPENDIX 7751 Group User s Manual 20 52 Appendix 7 Machine instructions...
Страница 504: ...APPENDIX 7751 Group User s Manual 20 53 Appendix 7 Machine instructions...
Страница 505: ...APPENDIX 7751 Group User s Manual 20 54 Appendix 7 Machine instructions...
Страница 506: ...APPENDIX 7751 Group User s Manual 20 55 Appendix 7 Machine instructions...
Страница 507: ...APPENDIX 7751 Group User s Manual 20 56 Appendix 7 Machine instructions...
Страница 508: ...APPENDIX 7751 Group User s Manual 20 57 Appendix 7 Machine instructions...
Страница 509: ...APPENDIX 7751 Group User s Manual 20 58 Appendix 7 Machine instructions...
Страница 510: ...APPENDIX 7751 Group User s Manual 20 59 Appendix 7 Machine instructions...
Страница 511: ...APPENDIX 7751 Group User s Manual 20 60 Appendix 7 Machine instructions...
Страница 535: ...APPENDIX Appendix 9 Q A 7751 Group User s Manual 20 84 MEMORANDUM...
Страница 536: ...GLOSSARY...
Страница 539: ...GLOSSARY 7751 Group User s Manual 4 MEMORANDUM...