M37544G Mitsubishi Electric, M37544G Datasheet - Page 24

• Manufacturer Part Number: M37544G
• Description: Single-Chip 8-Bit CMOS Microcomputer
• Manufacturer: Mitsubishi Electric

Fig. 24 Block diagram of timer 1 and timer A
24
Fig. 25 Block diagram of timer X
P0
3
Ring oscillator clock RING
/TX
Port P0
direction
register
OUT
3
P0
3
/TX
P1
f(X
4
f(X
OUT
/CNTR
Port P1
register
IN
IN
)/16
Port P0
)/2
output valid
P0
0
0
4
/CNTR
direction
Ring oscillator clock RING
3
latch
f(X
1
f(X
IN
f(X
Pulse output mode
IN
)/16
)/2
IN
Timer A operation mode bit
)
Timer X count
source selection bits
CNTR
edge switch bit
CNTR
edge switch bit
f(X
Port P1
latch
f(X
0
IN
active
“0”
IN
1
“1”
)/16
active
)/2
4
Pulse width
measurement
mode
Event
counter
mode
CNTR
edge switch bit
Timer A count
stop bit
0
Timer mode
Pulse output
mode
active
Prescaler 1 latch (8)
Rising edge detected
Falling edge detected
Timer X count stop bit
“1”
“0”
Prescaler 1 (8)
Timer A (low-order) latch (8)
Timer A (low-order) (8)
Q
Q
Prescaler X latch (8)
Prescaler X (8)
Toggle flip-flop
R
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Data bus
Pulse width HL
continuously
measurement mode
Data bus
Period measurement mode
T
MITSUBISHI MICROCOMPUTERS
Data bus
Timer 1 latch (8)
Timer A (high-order) latch (8)
Timer A (high-order) (8)
Timer 1 (8)
Timer X latch (8)
Pulse output mode
Timer X (8)
Timer X write control bit
Writing to timer X latch
7544 Group
Timer A interrupt
request bit
Timer 1 interrupt
request bit
Timer X
interrupt
request bit
CNTR
interrupt
request bit
0