M37544G Mitsubishi Electric, M37544G Datasheet - Page 23

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

Fig. 22 Structure of timer X mode register
Fig. 23 Timer count source set register
b7
b7
Note : f(X
a ceramic resonator or ring oscillator.
Do not use it at RC oscillation.
IN
) can be used as timer X count source when using
b0
b0
Timer X mode register
(TXM : address 002B
Timer count source set register 1
(TCSS1 : address 002E
Timer X operating mode bits
CNTR
Timer X count stop bit
P0
Timer X write control bit
Disable (return “0” when read)
Timer X count source selection bits
Disable (return “0” when read)
Fix this bit to “0”.
Disable (return “0” when read)
b1 b0
0
0
1
1
0 : Interrupt at falling edge
1 : Interrupt at rising edge
0 : Count start
1 : Count stop
0 : Output invalid (I/O port)
1 : Output valid (Inverted CNTR
0 : Write to latch and timer simultaneously
1 : Write to only latch
3
b1 b0
0
0
1
1
/TX
0 : Timer mode
1 : Pulse output mode
0 : Event counter mode
1 : Pulse width measurement mode
0
Count at rising edge
(in event counter mode)
Count at falling edge
(in event counter mode)
OUT
0 : f(X
1 : f(X
0 : f(X
1 : Not available
active edge switch bit
output valid bit
IN
IN
IN
)/16
)/2
) (Note 1)
16
, initial value: 00
16
, initial value: 00
0
output)
16
)
16
)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7544 Group
23