
S1C8F626 TECHNICAL MANUAL
EPSON
15
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Table 5.1.1(c) I/O Memory map (00FF17H–00FF1BH)
SR R/W
Address Bit
Name
Function
Comment
10
00FF17 D7
D6
D5
D4
D3
D2
D1
D0
–
PRTF3
PRTF2
PRTF1
PRTF0
–
R/W register
Programmable timer 3 source clock selection
Programmable timer 2 source clock selection
Programmable timer 1 source clock selection
Programmable timer 0 source clock selection
Constantly "0" when
being read
Reserved register
–
0
R/W
–
1
fOSC1
–
0
fOSC3
00FF18 D7
D6
D5
D4
D3
D2
D1
D0
PRPRT5
PST52
PST51
PST50
PRPRT4
PST42
PST41
PST40
Programmable timer 5 clock control
Programmable timer 5 division ratio
Programmable timer 4 clock control
Programmable timer 4 division ratio
0
R/W
On
Off
PST52
1
0
PST51
1
0
1
0
PST50
1
0
1
0
1
0
1
0
(OSC3)
fOSC3 / 4096
fOSC3 / 1024
fOSC3 / 256
fOSC3 / 64
fOSC3 / 32
fOSC3 / 8
fOSC3 / 2
fOSC3 / 1
(OSC1)
fOSC1 / 128
fOSC1 / 64
fOSC1 / 32
fOSC1 / 16
fOSC1 / 8
fOSC1 / 4
fOSC1 / 2
fOSC1 / 1
PST42
1
0
PST41
1
0
1
0
PST40
1
0
1
0
1
0
1
0
(OSC3)
fOSC3 / 4096
fOSC3 / 1024
fOSC3 / 256
fOSC3 / 64
fOSC3 / 32
fOSC3 / 8
fOSC3 / 2
fOSC3 / 1
(OSC1)
fOSC1 / 128
fOSC1 / 64
fOSC1 / 32
fOSC1 / 16
fOSC1 / 8
fOSC1 / 4
fOSC1 / 2
fOSC1 / 1
00FF19 D7
D6
D5
D4
D3
D2
D1
D0
PRPRT7
PST72
PST71
PST70
PRPRT6
PST62
PST61
PST60
Programmable timer 7 clock control
Programmable timer 7 division ratio
Programmable timer 6 clock control
Programmable timer 6 division ratio
0
R/W
On
Off
PST72
1
0
PST71
1
0
1
0
PST70
1
0
1
0
1
0
1
0
(OSC3)
fOSC3 / 4096
fOSC3 / 1024
fOSC3 / 256
fOSC3 / 64
fOSC3 / 32
fOSC3 / 8
fOSC3 / 2
fOSC3 / 1
(OSC1)
fOSC1 / 128
fOSC1 / 64
fOSC1 / 32
fOSC1 / 16
fOSC1 / 8
fOSC1 / 4
fOSC1 / 2
fOSC1 / 1
PST62
1
0
PST61
1
0
1
0
PST60
1
0
1
0
1
0
1
0
(OSC3)
fOSC3 / 4096
fOSC3 / 1024
fOSC3 / 256
fOSC3 / 64
fOSC3 / 32
fOSC3 / 8
fOSC3 / 2
fOSC3 / 1
(OSC1)
fOSC1 / 128
fOSC1 / 64
fOSC1 / 32
fOSC1 / 16
fOSC1 / 8
fOSC1 / 4
fOSC1 / 2
fOSC1 / 1
00FF1B D7
D6
D5
D4
D3
D2
D1
D0
–
PRTF7
PRTF6
PRTF5
PRTF4
–
Programmable timer 7 source clock selection
Programmable timer 6 source clock selection
Programmable timer 5 source clock selection
Programmable timer 4 source clock selection
Constantly "0" when
being read
–
0
R/W
–
fOSC1
–
fOSC3