APPENDIX
Appendix 3. Control registers
7751 Group User’s Manual
20–21
Event counter mode
b7
b6
b5
b4
b3
b2
b1
b0
0
0 1
Bit
Up-down switching factor select
bit
Count polarity select bit
Bit name
These bits are ignored in event counter mode.
Fix this bit to “0” in event counter mode.
✕
: It may be either “0” or “1.”
7
Functions
0 : Counts at falling edge of external signal
1 : Counts at rising edge of external signal
0 : Contents of up-down register
1 : Input signal to TAi
OUT
pin
At reset
0
0
0
0
0
RW
Pulse output function select bit
Operating mode select
bits
1
0 : No pulse output (TAi
OUT
pin functions
as a programmable I/O port.)
1 : Pulse output (TAi
OUT
pin functions
as a pulse output pin.)
0 1 : Event counter mode
b1 b0
0
0
0
✕ ✕
0
2
RW
RW
3
4
5
6
RW
RW
RW
RW
RW
RW
Timer Ai mode register (i = 0 to 4) (Addresses 56
16
to 5A
16
)
b7
b0
b7
b0
(b15)
(b8)
Timer A0 register (Addresses 47
16
, 46
16
)
Timer A1 register (Addresses 49
16
, 48
16
)
Timer A2 register (Addresses 4B
16
, 4A
16
)
Timer A3 register (Addresses 4D
16
, 4C
16
)
Timer A4 register (Addresses 4F
16
, 4E
16
)
RW
15 to 0
Bit
Functions
At reset
RW
These bits can be set to “0000
16
” to “FFFF
16
.”
Assuming that the set value = n, the counter
divides the count source frequency by n + 1
when down-counting, or by FFFF
16
– n + 1
when up-counting.
When reading, the register indicates the
counter value.
Undefined
Summary of Contents for 7700 FAMILY
Page 2: ...MITSUBISHI 16 BIT SINGLE CHIP MICROCOMPUTER 7700 FAMILY 7751 SERIES 7751 Group User s Manual...
Page 11: ...Table of Contents viii 7751 Group User s Manual MEMORANDUM...
Page 157: ...TIMER B 6 28 7751 Group User s Manual 6 5 Pulse period pulse width measurement mode MEMORANDUM...
Page 245: ...7751 Group User s Manual 8 36 A D CONVERTER Precautions when using A D converter MEMORANDUM...
Page 265: ...7751 Group User s Manual WAIT MODE 11 6 11 3 Precautions for Wait mode MEMORANDUM...
Page 289: ...CONNECTION WITH EXTERNAL DEVICES 12 4 Hold function 7751 Group User s Manual 12 24 MEMORANDUM...
Page 290: ...CHAPTER 13 RESET 13 1 Hardware reset 13 2 Software reset...
Page 302: ...CHAPTER 14 CLOCK GENERATING CIRCUIT 14 1 Oscillation circuit example 14 2 Clock...
Page 307: ...CLOCK GENERATING CIRCUIT 7751 Group User s Manual 14 6 14 2 Clock MEMORANDUM...
Page 360: ...CHAPTER 16 STANDARD CHARACTERISTICS 16 1 Standard characteristics...
Page 366: ...CHAPTER 17 APPLICATIONS 17 1 Memory expansion...
Page 405: ...APPLICATIONS 7751 Group User s Manual 17 40 17 1 Memory expansion MEMORANDUM...
Page 406: ...CHAPTER 18 PROM VERSION 18 1 EPROM mode 18 2 Usage precaution...
Page 417: ...7751 Group User s Manual PROM VERSION 18 12 18 2 Usage precaution MEMORANDUM...
Page 418: ...CHAPTER 19 FLASH MEMORY VERSION 19 1 Parallel input output mode 19 2 Serial input output mode...
Page 451: ...FLASH MEMORY VERSION 7751 Group User s Manual 19 34 19 2 Serial input output mode MEMORANDUM...
Page 484: ...APPENDIX 7751 Group User s Manual 20 33 Appendix 4 Package outlines 80D0...
Page 489: ...APPENDIX 7751 Group User s Manual 20 38 Appendix 6 Hexadecimal instruction code table...
Page 490: ...APPENDIX 7751 Group User s Manual 20 39 Appendix 6 Hexadecimal instruction code table...
Page 492: ...APPENDIX 7751 Group User s Manual 20 41 Appendix 7 Machine instructions...
Page 493: ...APPENDIX 7751 Group User s Manual 20 42 Appendix 7 Machine instructions...
Page 494: ...APPENDIX 7751 Group User s Manual 20 43 Appendix 7 Machine instructions...
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Page 535: ...APPENDIX Appendix 9 Q A 7751 Group User s Manual 20 84 MEMORANDUM...
Page 536: ...GLOSSARY...
Page 539: ...GLOSSARY 7751 Group User s Manual 4 MEMORANDUM...