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參數(shù)資料
| 型號： | M306H7MC-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 97/115頁 |
| 文件大?。?/td> | 3146K |
| 代理商： | M306H7MC-XXXFP |
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Rev.2.10
Oct 25, 2006
Page 82 of 326
REJ03B0152-0210
M306H7MG-XXXFP/MC-XXXFP/FGFP
9.TIMERS
9.1.3
One-shot Timer Mode
In one-shot timer mode, the timer is activated only once by one trigger. (See Table 9.4.) When the trigger
occurs, the timer starts up and continues operating for a given period. Figure 9.10 shows the TAiMR register in
one-shot timer mode.
Table 9.4
Specifications in One-shot Timer Mode
Item
Specification
Count source
f1, f2, f8, f32, fC32
Count operation
Down-count
When the counter reaches 000016, it stops counting after reloading a new value
If a trigger occurs when counting, the timer reloads a new count and restarts counting
Divide ratio
1/n
n : set value of TAi register
000016 to FFFF16
However, the counter does not work if the divide-by-n value is set to 000016.
Count start condition
TAiS bit of TABSR register = “1” (start counting) and one of the following
triggers occurs.
External trigger input from the TAiIN pin
Timer B2 overflow or underflow,
timer Aj (j=i-1, except j=4 if i=0) overflow or underflow,
timer Ak (k=i+1, except k=0 if i=4) overflow or underflow
The TAiOS bit of ONSF register is set to “1” (= timer starts)
Count stop condition
When the counter is reloaded after reaching “000016”
TAiS bit is set to “0” (= stop counting)
Interrupt request generation timing
When the counter reaches “000016”
TAiIN pin function
I/O port or trigger input
TAiOUT pin function
I/O port or pulse output
Read from timer
An indeterminate value is read by reading TAi register
Write to timer
When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
When counting (after 1st count source input)
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
Select function
Pulse output function
The timer outputs a low when not counting and a high when counting.
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