307
CHAPTER 14 16-BIT RELOAD TIMER
❍
External trigger operation
The counter is started if a valid edge (rising, falling, or both edges can be selected) is input to
the TIN pin.
Figure 14.4-5 shows the external trigger operation in reload mode.
Figure 14.4-5 Count operation in reload mode (external trigger operation)
Note:
The trigger pulse width input to the TIN pin shall be 2T (T: machine cycle) or more.
❍
External gate input operation
Counting starts when the software trigger bit (TRG) is set to "1" while the timer counter enable
bit (CNTE) of the timer control status register (TMCSR) is set to "1".
Counting starts when a valid level ("L" level or "H" level can be selected) of gate input specified
in the operation mode setting bits(MOD2, MOD1, and MOD0) is input to the TIN pins.
Figure 14.4-6 Count operation in reload mode (external gate input operation)
Note:
The trigger pulse width input to the TIN pin shall be 2T (T: machine cycle) or more.
Count clock
Counter
Data load signal
UF bit
CNTE bit
TIN pin
TOT pin
2T to 2.5T
*
T : Machine cycle * : The time from trigger input to loading the reload data is 1T.
-1
-1
-1
-1
Reload
data
Reload
data
Reload
data
0000
H
0000
H
Reload
data
0000
H
0000
H
-1
-1
-1
-1
-1
Internal count clock
Counter
Reload
data
Reload data
Data load signal
UF bit
CNTE bit
TRG bit
TIN pin
TOT pin
* : It takes 1T from trigger input to loading reload data.
1 machine cycle*
Summary of Contents for MB90480 Series
Page 2: ......
Page 4: ......
Page 10: ...vi ...
Page 128: ...106 CHAPTER 4 RESET ...
Page 174: ...152 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 198: ...176 CHAPTER 7 MODE SETTING ...
Page 220: ...198 CHAPTER 9 TIMEBASE TIMER ...
Page 238: ...216 CHAPTER 11 WATCH TIMER ...
Page 280: ...258 CHAPTER 12 16 BIT INPUT OUTPUT TIMER ...
Page 406: ...384 CHAPTER 17 8 10 BIT A D CONVERTER ...
Page 478: ...456 CHAPTER 20 CHIP SELECTION FACILITY ...
Page 494: ...472 CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION ...
Page 498: ...476 CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE ...
Page 526: ...504 CHAPTER 23 2M 3M BIT FLASH MEMORY ...
Page 536: ...514 CHAPTER 24 EXAMPLES OF MB90F481B MB90F482B MB90F488B MB90F489B SERIAL PROGRAMMING ...
Page 570: ...548 CHAPTER 25 PWC TIMER ONLY MB90485 SERIES ...
Page 688: ......