Epson S1C88650 Technical Manual page 28

5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Address Bit Name
00FF15 D7 PRPRT3
D6 PST32
D5 PST31
D4 PST30
D3 PRPRT2
D2 PST22
D1 PST21
D0 PST20
00FF17 D7 –
–
D6 – –
D5 –
–
D4 – R/W register
D3 PRTF3
Programmable timer 3 source clock selection
D2 PRTF2 Programmable timer 2 source clock selection
D1 PRTF1
Programmable timer 1 source clock selection
D0 PRTF0 Programmable timer 0 source clock selection
00FF18 D7 PRPRT5
D6 PST52
D5 PST51
D4 PST50
D3 PRPRT4
D2 PST42
D1 PST41
D0 PST40
20
Table 5.1.1(c) I/O Memory map (00FF15H–00FF18H)
Function
Programmable timer 3 clock control
Programmable timer 3 division ratio
PST32 PST31 PST30 (OSC3)
1 1 1 f / 4096
OSC3
1 1 0 f / 1024
OSC3
1 0 1 f / 256
OSC3
1 0 0 f / 64
OSC3
0 1 1 f / 32
OSC3
0 1 0 f / 8
OSC3
0 0 1 f / 2
OSC3
0 0 0 f / 1
OSC3
Programmable timer 2 clock control
Programmable timer 2 division ratio
PST22 PST21 PST20 (OSC3)
1 1 1 f / 4096
OSC3
1 1 0 f / 1024
OSC3
1 0 1 f / 256
OSC3
1 0 0 f / 64
OSC3
0 1 1 f / 32
OSC3
0 1 0 f / 8
OSC3
0 0 1 f / 2
OSC3
0 0 0 f / 1
OSC3
Programmable timer 5 clock control
Programmable timer 5 division ratio
PST52 PST51 PST50 (OSC3)
1 1 1 f / 4096
OSC3
1 1 0 f / 1024
OSC3
1 0 1 f / 256
OSC3
1 0 0 f / 64
OSC3
0 1 1 f / 32
OSC3
0 1 0 f / 8
OSC3
0 0 1 f / 2
OSC3
0 0 0 f / 1
OSC3
Programmable timer 4 clock control
Programmable timer 4 division ratio
PST42 PST41 PST40 (OSC3)
1 1 1 f / 4096
OSC3
1 1 0 f / 1024
OSC3
1 0 1 f / 256
OSC3
1 0 0 f / 64
OSC3
0 1 1 f / 32
OSC3
0 1 0 f / 8
OSC3
0 0 1 f / 2
OSC3
0 0 0 f / 1
OSC3
1
On
(OSC1)
f / 128
OSC1
f / 64
OSC1
f / 32
OSC1
f / 16
OSC1
f / 8
OSC1
f / 4
OSC1
f / 2
OSC1
f / 1
OSC1
On
(OSC1)
f / 128
OSC1
f / 64
OSC1
f / 32
OSC1
f / 16
OSC1
f / 8
OSC1
f / 4
OSC1
f / 2
OSC1
f / 1
OSC1
–
–
–
1
f
OSC1
f
OSC1
f
OSC1
f
OSC1
On
(OSC1)
f / 128
OSC1
f / 64
OSC1
f / 32
OSC1
f / 16
OSC1
f / 8
OSC1
f / 4
OSC1
f / 2
OSC1
f / 1
OSC1
On
(OSC1)
f / 128
OSC1
f / 64
OSC1
f / 32
OSC1
f / 16
OSC1
f / 8
OSC1
f / 4
OSC1
f / 2
OSC1
f / 1
OSC1
EPSON
0 SR R/W Comment
0 R/W
Off
0 R/W
0 R/W
0 R/W
0 R/W
Off
0 R/W
0 R/W
0 R/W
–
– Constantly "0" when
–
– being read
–
–
0 R/W
0 Reserved register
0 R/W
f
OSC3
0 R/W
f
OSC3
0 R/W
f
OSC3
0 R/W
f
OSC3
0 R/W
Off
0 R/W
0 R/W
0 R/W
0 R/W
Off
0 R/W
0 R/W
0 R/W
S1C88650 TECHNICAL MANUAL