參數(shù)資料
型號(hào)： M3826AMFLXXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù)： 19/80頁
文件大?。?/td> 1561K
代理商： M3826AMFLXXXFP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3826 Group
25
TIMERS
The 3826 group has five timers: timer X, timer Y, timer 1, timer 2,
and timer 3. Timer X and timer Y are 16-bit timers, and timer 1,
timer 2, and timer 3 are 8-bit timers.
All timers are down count timers. When the timer reaches “0016”,
an underflow occurs at the next count pulse and the correspond-
ing timer latch is reloaded into the timer and the count is contin-
ued. When a timer underflows, the interrupt request bit corre-
sponding to that timer is set to “1”.
Read and write operation on 16-bit timer must be performed for
both high- and low-order bytes. When reading a 16-bit timer, read
the high-order byte first. When writing to a 16-bit timer, write the
low-order byte first. The 16-bit timer cannot perform the correct
operation when reading during the write operation, or when writing
during the read operation.
Fig. 20 Timer block diagram
“1”
P55/CNTR1
“0”
"10"
"00","01","11"
P54/CNTR0
Q
T
S
“0”
“1”
“0”
Q D
“0”
Q D
“1”
“0”
“1”
"10"
Q
T
S
“0”
“1”
“0”
“1”
P43/
φ/TOUT
XCIN
“0”
“1”
CNTR0 active
edge switch bit
Timer 1 count source
selection bit
Real time port
control bit “0”
f(XIN)/16
(f(XCIN)/16
when
φ = XCIN/2)
CNTR1 active
edge switch bit
Timer Y stop
control bit
Falling edge detection
Period
measurement mode
Timer Y
interrupt
request
Pulse width HL continuously
measurement mode
Rising edge detection
Timer Y
operating
mode bits
Timer X
interrupt
request
Timer X mode register
write signal
P43 direction register
Pulse output mode
P54 latch
Timer X stop
control bit
Timer X write
control bit
Latch
Timer X operat-
ing mode bits
“00”,“01”,“11”
Pulse width
measurement
mode
CNTR0 active
edge switch bit
Pulse output mode
P54 direction register
TOUT output
active edge
switch bit “0”
Timer 2 write
control bit
TOUT output
control bit
Timer 3 count
source selection bit
Timer 2
interrupt
request
Timer 3
interrupt
request
Timer 2 count source
selection bit
Timer 1
interrupt
request
Data bus
Real time port
control bit “1”
Real time port
control bit “1”
Timer Y (low) (8)
Timer Y (high) (8)
Timer 3 latch (8)
Timer 3 (8)
Timer 1 latch (8)
Timer 1 (8)
Timer 2 latch (8)
Timer 2 (8)
Timer X (low) (8)
Timer X (high) (8)
Timer X (low) latch (8)
Timer X (high) latch (8)
Timer Y (low) latch (8)
Timer Y (high) latch (8)
Latch
TOUT output
control bit
P43 latch
f(XIN)/16
(f(XCIN)/16 when
φ = XCIN/2)
f(XIN)/16
(f(XCIN)/16 when
φ = XCIN/2)
f(XIN)/16
(f(XCIN)/16 when
φ = XCIN/2)
f(XIN)/16
(f(XCIN)/16 when
φ = XCIN/2)
P52 direction register
P52 data for
real time port
P53 data for
real time port
P52 latch
P53 direction register
P53 latch
φ
φ output control bit
P52/RTP0
P53/RTP1
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