參數(shù)資料
型號(hào)： M37545G8KP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO32
封裝： 11 X 5.60 MM, 0.65 MM PITCH, PLASTIC, LSSOP-32
文件頁(yè)數(shù)： 22/65頁(yè)
文件大?。?/td> 782K
代理商： M37545G8KP
Rev.1.07
Mar 19, 2009
Page 27 of 60
REJ03B0140-0107
7545 Group
3. Timer 3
Timer 3 is an 8-bit timer and counts the clock selected by the
timer 3 count source selection bit. When Timer 3 underflows, the
timer 3 interrupt request bit is set to “1”.
Timer 3 has a timer latch to retain the reload value.
The value written to timer 3 (T3) while timer 3 is stopped is
transferred to the timer latch and the counter.
After the count of timer 3 (T3) starts, the value written to timer 3
is transferred only to the timer 3 latch. The value is not
transferred to the counter at write.
When timer underflows, the value of timer 3 latch is transferred
to the counter. (Since a count value of a timer is retained, the
written value becomes the count value of the timer after the next
underflow.)
When timer 3 (T3) is read, the count value of the timer is read.
When the timer 3 is read, the count value of timer 3 is read since
the count value of the timer 3 is retained until writing to timer 3
(T3) is performed after timer 3 is stopped.
Timer 3 always operates in the timer mode.
Timer 3 counts the clock selected by the timer 3 count source
selection bit. The contents of Timer 3 is decremented by 1 each
time the count clock is input.
The division ratio of Timer 3 is 1/(n+1) provided that the value
of Timer 3 is n.
Timer 3 is stopped by setting “1” to the timer 3 count stop bit.
Timer 2 and timer 3 are also used for the control timer of the
carrier wave control circuit.
Fig. 22 Structure of timer count source set register
Fig. 23 Timer 1, 2, 3 control register
b7
b0
Timer count source set register
(TCSS : address 002A16, initial value: 0016)
Timer 2 count source selection bits
b1 b0
0
0 : f(XIN)/16
0
1 : f(XIN)/2
1
0 : f(XIN)/8
1
1 : f(XIN)/1
Disable (return “0” when read)
Timer 3 count source selection bits
b3 b2
0
0 : f(XIN)/16
0
1 : f(XIN)/2
1
0 : f(XIN)/8
1
1 : Carrier wave output (CARRY)
b7
Timer 1, 2, 3 control register
(TC123 : address 002B16, initial value: 0616)
Timer 1 count stop bit
0: Count start
1: Count stop
Timer 2 count stop bit
0: Count start
1: Count stop
Timer 3 count stop bit
0: Count start
1: Count stop
Disable (return “0” when read)
b0
相關(guān)PDF資料
PDF描述
M37545G8-XXXGP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32
M37546G2-XXXSP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
M37546G2HP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQCC36
M37546G4-XXXHP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQCC36
M37546G2-XXXGP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37545G8-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37545GCGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37545GCKP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37545GC-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37545GFGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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