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CHAPTER 14 16-BIT RELOAD TIMER
14.1 Overview of 16-Bit Reload Timer
The 16-bit reload timer has the following functions:
•
Clock mode can be selected from the internal clock mode and event count mode.
•
When an underflow of 16-bit timer register (TMR) occurs, the count operation can be
selected either the one-shot mode that stops the operation or the reload mode that
continues its operation by reloading count setting value.
•
When an underflow of 16-bit timer register (TMR) generated, the timer can be used
as the interval timer by generating an interrupt.
■
Operation modes of the 16-bit reload timer
Operation modes of the 16-bit reload timer are shown below.
■
Internal clock mode
One type of count clock can be selected among three types of internal clocks.
❍
Software trigger operation
Sets the TRG bits of the timer control status register (TMCSR) to "1" to start a counting
operation. Trigger input by the TRG bit can also be enabled when external trigger operation and
external gate input operation are performed.
❍
External trigger operation
Starts counting operation when the selected edge (rising, falling edges, or both) is input to the
TIN0 pin.
❍
External gate input operation
Continues counting operation while the selected signal ("L" or "H") is input to the TIN0 pin.
■
Event count mode (external clock mode)
The function that starts countdown when the selected edge (rising, falling, or both) is input to the
TIN0 pin. This can also be used as an interval timer if an external clock with constant interval
time is used.
Clock mode
Counting
16-bit reload timer operation
Internal clock mode
Reload mode
Software trigger operation
External trigger operation
External gate input operation
One-shot mode
Event count mode
(External clock mode)
Reload mode
Software trigger operation
One-shot mode
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 ...
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