M38503M4H Datasheet, PDF (21/51 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Data bus
f(XIN)/16
(f(XCIN)/16 at low-speed mode)
f(XIN)/2
(f(XCIN)/2 at low-speed mode)
Pulse width
Timer X count source selection bit
measurement
mode
Prescaler X latch (8)
Timer mode
Pulse output mode
Prescaler X (8)
P27/CNTR0
CNTR0 active
edge selection
“0” bit
Event
counter
mode
Timer X count stop bit
“1”
Port P27
direction register
Port P27
latch
Pulse output mode
CNTR0 active
edge selection “1”
bit
“0”
Q
Toggle flip-flop ^T
Q
R
Data bus
f(XIN)/16
(f(XCIN)/16 at low-speed mode)
f(XIN)/2
(f(XCIN)/2 at low-speed mode)
Timer Y count source selection bit
P40/CNTR1
CNTR1 active
edge selection
“0” ^bit
Pulse width
measure-
ment mode
Event
counter
mode
Prescaler Y latch (8)
Timer mode
Pulse output mode
Prescaler Y (8)
Timer Y count stop bit
“1”
Port P40
direction register
Port P40
latch
Pulse output mode
CNTR1 active
edge selection “1”
bit
“0”
Q
Toggle flip-flop T
Q
R
Data bus
Timer X latch (8)
Timer X (8)
To timer X interrupt
request bit
To CNTR0 interrupt
request bit
Timer X latch write pulse
Pulse output mode
Timer Y latch (8)
Timer Y (8)
To timer Y interrupt
request bit
To CNTR1 interrupt
request bit
Timer Y latch write pulse
Pulse output mode
Prescaler 12 latch (8)
f(XIN)/16
(f(XCIN)/16 at low-speed mode)
f(XCIN)
Timer 12 count source selection bit
Prescaler 12 (8)
Timer 1 latch (8)
Timer 1 (8)
Timer 2 latch (8)
Timer 2 (8)
To timer 2 interrupt
request bit
To timer 1 interrupt
request bit
Fig. 17 Block diagram of timer X, timer Y, timer 1, and timer 2
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