10
10-92
MULTIJUNCTION TIMERS
10.3 TOP (Output-Related 16-Bit Timer)
32180 Group User’s Manual (Rev.1.0)
In the example below, the counter and the reload register are initially set to H’A000 and H’E000, respectively.
When the timer is enabled, the counter starts counting down and when it underflows after reaching the
minimum count, the counter is loaded with the content of the reload register and continues counting down.
H'FFFF
H'0000
H'E000
H'A000
H'E000
H'(E000-1)
H'(E000-1)
H'FFFF
H'FFFF
Data inverted
by underflow
Data inverted
by underflow
Data inverted by
enable
Count clock
Correction register
F/F output
TOP interrupt request
due to underflow
Enable bit
Note: • This diagram does not show detailed timing information.
Reload register
Counter
Underflow
(first time)
Underflow
(second time)
Enabled
(by writing to the enable bit
or by external input)
Count down from the
counter's set value
Count down from the
reload register's
set value
Count down from the
reload register's
set value
(Unused)
Figure 10.3.18 Typical Operation in TOP Continuous Output Mode
Summary of Contents for M32R/ECU Series
Page 17: ...12 This page is blank for reasons of layout...
Page 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Page 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Page 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Page 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Page 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...
