M37510M6 Datasheet, PDF (14/43 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
7510 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
TIMERS
The 7510 group has five built-in timers: timer X, timer Y, timer 1,
timer 2, and timer 3. Timer X and timer Y are 16-bit timers,
whereas 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
continued. When a timer underflows, the interrupt request bit cor-
XCIN
1/32
Internal system
clock selection bit
XIN
“1”
1/16
“0”
P42/CNTR0
CNTR0 active edge
selection bit
“0”
“1”
Timer X stop control bit
“00”
“01”
Timer XL latch (8)
“11”
Timer XL (8)
“10”
Timer X operation mode bit
Timer X write control bit
Timer XH latch (8)
Timer XH (8)
Timer X interrupt request
P42 direction register
P42 latch
Pulse output mode
P43/CNTR1
“0”
“1”
CNTR1 active edge
selection bit
“0”
CNTR0 active “1”
edge selection bit
QS
T
Q
Pulse output mode
CNTR0 interrupt request
Rising edge detector
Falling edge detector
Pulse width continuously
measurement mode
Period
measurement mode
“00” ^{Timer Y}
“01”
stop
control bit
“11”
Timer YL latch (8)
Timer YH latch (8)
Timer YL (8)
“10”
Timer Y operation mode bit
Timer YH (8)
Timer Y interrupt request
Timer Y operation mode bit
“11”
CNTR1 interrupt request
“00”
“01”
“10”
Timer 1 latch (8)
“0”
Timer 1 (8)
“1”
Timer 1 count source selection bit
Timer 2 latch (8)
“1”
Timer 2 (8)
“0” _{Timer 2 count source}
selection bit
Timer 2 write control bit
Timer 2 interrupt request
Timer 3 latch (8)
“0”
Timer 3 (8)
“1” _{Timer 3 count source}
selection bit
Timer 1 interrupt request
Timer 3 interrupt request
Fig. 9 Block diagram of Timer
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