M38027E8SP Datasheet, PDF (17/51 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3802 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Data bus
Oscillator Divider
f(XIN)
1/16
Pulse width
measurement
mode
P54/CNTR0 pin ^{CNTR0 active}
edge switch bit
“0”
Event
counter
mode
Prescaler X latch (8)
Timer mode
Pulse output
mode
Prescaler X (8)
Timer X count stop bit
“1”
CNTR0 active
edge switch
bit
Q
“1”
Toggle flip- flop T
Port P54
direction register
Port P54
latch
Q
“0”
R
Pulse output
mode
Data bus
Pulse width
measurement
mode
P55/CNTR1 pin ^{CNTR1 active}
edge switch bit
“0”
Event
counter
mode
Prescaler Y latch (8)
Timer mode
Pulse output
mode
Prescaler Y (8)
Timer Y count stop bit
“1”
CNTR1 active
edge switch
bit
Q
“1”
Toggle flip- flop T
Port P55
direction register
Port P55
latch
Q
“0”
R
Pulse output
mode
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)
Timer 1 latch (8)
Timer 2 latch (8)
Prescaler 12 (8)
Timer 1 (8)
Fig. 9 Block diagram of timer X, timer Y, timer 1, and timer 2
Timer 2 (8)
To timer 2 interrupt
request bit
To timer 1 interrupt
request bit
17