HARDWARE
1-32
7540 Group User
’
s Manual
Fig. 26
Structure of timer Y, Z waveform output control register
Fig. 27 Structure of one-shot start register
Fig. 25 Structure of timer Y, Z mode register
b7 b0
Timer Y, Z mode register
(TYZM : address 0020
16
, initial value: 00
16
)
Timer Y operating mode bit
0 : Timer mode
1 : Programmable waveform generation mode
Not used (return
“
0
”
when read)
Timer Y write control bit
0 : Write to latch and timer simultaneously
1 : Write to only latch
Timer Y count stop bit
0 : Count start
1 : Count stop
Timer Z operating mode bits
b5 b4
0 0 : Timer mode
0 1 : Programmable waveform generation mode
1 0 : Programmable one-shot generation mode
1 1 : Programmable wait one-shot generation mode
Timer Z write control bit
0 : Write to latch and timer simultaneously
1 : Write to only latch
Timer Z count stop bit
0 : Count start
1 : Count stop
b7 b0
Timer Y, Z waveform output control register
(PUM : address 0024
16
, initial value: 00
16
)
Timer Y primary waveform extension control bit
0 : Waveform not extended
1 : Waveform extended
Timer Y secondary waveform extension control bit
0 : Waveform not extended
1 : Waveform extended
Timer Z primary waveform extension control bit
0 : Waveform not extended
1 : Waveform extended
Timer Z secondary waveform extension control bit
0 : Waveform not extended
1 : Waveform extended
Timer Y output level latch
0 :
“
L
”
output
1 :
“
H
”
output
Timer Z output level latch
0 :
“
L
”
output
1 :
“
H
”
output
INT
0
pin one-shot trigger control bit
0 : INT
0
pin one-shot trigger invalid
1 : INT
0
pin one-shot trigger valid
INT
0
pin one-shot trigger active edge selection bit
0 : Falling edge trigger
1 : Rising edge trigger
b7 b0
One-shot start register
(ONS : address 002A
16
, initial value: 00
16
)
Timer Z one-shot start bit
0 : One-shot stop
1 : One-shot start
Not used (return
“
0
”
when read)
FUNCTIONAL DESCRIPTION