
13 PROGRAMMABLE TIMER
S1C38000 TECHNICAL MANUAL
EPSON
109
bit 1
Mode Bit
0Timer do not reload the initial count value until reaches to zero. Timer interrupt
arises immediately when enable the timer.
1Timer reload the initial count value while the timer is disabled if the timer is
configured as single or cyclic mode. Timer interrupt arises when the count value
reaches to zero.
bit 0
Timer Interrupt Request (Read Only)
0
No Interrupt Request
1
Interrupt Request exists (writing to the Timer 1/3 Interrupt Flag Clear Register,
PT[2Ch], will clear this request).
This is a write-only port to clear the interrupt flag for timers 1 and 3. Use the Timer Index Register,
PT[7Ch], to select one of these timers. The value written is a don’t care.
bit 4
Timer 4 Interrupt Request
(same as Timer 0/2/4 Control Register bit 0, Interrupt Request)
0
No interrupt request
1
Interrupt request exists (Writing to the Timer 0/2/4 Interrupt Flag Clear Register
clears this request.)
bit 3
Timer 3 Interrupt Request
(same as Timer 1/3 Control Register bit 0, Interrupt Request)
0
No interrupt request
1
Interrupt request exists (Writing to the Timer 1/3 Interrupt Flag Clear Register
clears this request.)
bit 2
Timer 2 Interrupt Request
(same as Timer 0/2/4 Control Register bit 0, Interrupt Request)
0
No interrupt request
1
Interrupt request exists (Writing to the Timer 0/2/4 Interrupt Flag Clear Register
clears this request.)
bit 1
Timer 1 Interrupt Request
(same as Timer 1/3 Control Register bit 0, Interrupt Request)
0
No interrupt request
1
Interrupt request exists (Writing to the Timer 1/3 Interrupt Flag Clear Register
clears this request.)
bit 0
Timer 0 Interrupt Request
(same as Timer 0/2/4 Control Register bit 0, Interrupt Request)
0
No interrupt request
1
Interrupt request exists (Writing to theTimer 0/2/4 Interrupt Flag Clear Register
clears this request.)
Timer 1/3 Interrupt Flag Clear Register
PT[2Ch]
Write Only
Timer 1/3 Interrupt Flag Clear
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Timer 1/3 Interrupt Flag Clear
15
14
13
12
11
10
9876543210
Timer Interrupt Register
PT[78h]
Default = 0000 0000h
Read Only
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
n/a
Timer 4
Interrupt
Timer 3
Interrupt
Timer 2
Interrupt
Timer 1
Interrupt
Timer 0
Interrupt
15
14
13
12
11
10
9876543210