參數(shù)資料
型號: M306H3FCFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP116
封裝: 20 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-116
文件頁數(shù): 129/135頁
文件大?。?/td> 2583K
代理商: M306H3FCFP
Rev.1.00
2004.03.23
page 93 of 320
M306H3MC-XXXFP/FCFP
Item
Specification
Count source
External signals input to TAiIN pin (i=0 to 4) (effective edge can be selected
in program)
Timer B2 overflows or underflows,
timer Aj (j=i-1, except j=4 if i=0) overflows or underflows,
timer Ak (k=i+1, except k=0 if i=4) overflows or underflows
Count operation
Up-count or down-count can be selected by external signal or program
When the timer overflows or underflows, it reloads the reload register con-
tents and continues counting. When operating in free-running mode, the
timer continues counting without reloading.
Divided ratio
1/ (FFFF16 - n + 1) for up-count
1/ (n + 1) for down-count
n : set value of TAi register
000016 to FFFF16
Count start condition
Set TAiS bit of TABSR register to “1” (= start counting)
Count stop condition
Set TAiS bit to “0” (= stop counting)
Interrupt request generation timing Timer overflow or underflow
TAiIN pin function
I/O port or count source input
TAiOUT pin function
I/O port, pulse output, or up/down-count select input
Read from timer
Count value can be 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
Free-run count function
Even when the timer overflows or underflows, the reload register content is
not reloaded to it
Pulse output function
Whenever the timer underflows or underflows, the output polarity of TAiOUT
pin is inverted . When not counting, the pin outputs a low.
(2) Event Counter Mode
In event counter mode, the timer counts pulses from an external device or overflows and underflows of
other timers. Timers A2, A3 and A4 can count two-phase external signals. Table 2.10.2 lists specifica-
tions in event counter mode (when not processing two-phase pulse signal). Table 2.10.3 lists specifica-
tions in event counter mode (when processing two-phase pulse signal with the timers A2, A3 and A4).
Figure 2.10.8 shows TAiMR register in event counter mode (when not processing two-phase pulse sig-
nal). Figure 2.10.9 shows TA2MR to TA4MR registers in event counter mode (when processing two-
phase pulse signal with the timers A2, A3 and A4).
Table 2.10.2. Specifications in Event Counter Mode (when not processing two-phase pulse signal)
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