S1C88650 TECHNICAL MANUAL EPSON 21
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Table 5.1.1(d) I/O Memory map (00FF19H–00FF22H)
SR R/WAddress Bit Name Function Comment10
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
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
On
On
Off
Off
PST72
1
1
1
1
0
0
0
0
PST71
1
1
0
0
1
1
0
0
PST70
1
0
1
0
1
0
1
0
(OSC3)
f
OSC3
/ 4096
f
OSC3
/ 1024
f
OSC3
/ 256
f
OSC3
/ 64
f
OSC3
/ 32
f
OSC3
/ 8
f
OSC3
/ 2
f
OSC3
/ 1
(OSC1)
f
OSC1
/ 128
f
OSC1
/ 64
f
OSC1
/ 32
f
OSC1
/ 16
f
OSC1
/ 8
f
OSC1
/ 4
f
OSC1
/ 2
f
OSC1
/ 1
PST62
1
1
1
1
0
0
0
0
PST61
1
1
0
0
1
1
0
0
PST60
1
0
1
0
1
0
1
0
(OSC3)
f
OSC3
/ 4096
f
OSC3
/ 1024
f
OSC3
/ 256
f
OSC3
/ 64
f
OSC3
/ 32
f
OSC3
/ 8
f
OSC3
/ 2
f
OSC3
/ 1
(OSC1)
f
OSC1
/ 128
f
OSC1
/ 64
f
OSC1
/ 32
f
OSC1
/ 16
f
OSC1
/ 8
f
OSC1
/ 4
f
OSC1
/ 2
f
OSC1
/ 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
0
0
0
R/W
R/W
R/W
R/W
–
–
–
–
f
OSC1
f
OSC1
f
OSC1
f
OSC1
–
–
–
–
f
OSC3
f
OSC3
f
OSC3
f
OSC3
00FF20 D7
D6
D5
D4
D3
D2
D1
D0
PK01
PK00
PSIF1
PSIF0
–
–
PTM1
PTM0
Constantly "0" when
being read
0
0
–
–
0
R/W
R/W
R/W
–
–
–
–
K00–K07 interrupt priority register
Serial interface interrupt priority register
–
–
Clock timer interrupt priority register
00FF21 D7
D6
D5
D4
D3
D2
D1
D0
–
–
PPT3
PPT2
PPT1
PPT0
–
–
Constantly "0" when
being read
Constantly "0" when
being read
–
–
–
–
–
–
–
–
–
–
–
–
–
PPT3
PPT1
1
1
0
0
PPT2
PPT0
1
0
1
0
–
–
Programmable timer 3–2 interrupt
priority register
Programmable timer 1–0 interrupt
priority register
–
–
Priority
level
PK01
PSIF1
1
1
0
0
Priority
level
PK00
PSIF0
1
0
1
0
Level 3
Level 2
Level 1
Level 0
Level 3
Level 2
Level 1
Level 0
00FF22 D7
D6
D5
D4
D3
D2
D1
D0
–
–
–
–
ETM32
ETM8
ETM2
ETM1
–
–
–
–
Clock timer 32 Hz interrupt enable register
Clock timer 8 Hz interrupt enable register
Clock timer 2 Hz interrupt enable register
Clock timer 1 Hz interrupt enable register
–
–
–
–
0 R/W
–
–
–
–
Interrupt
enable
–
–
–
–
Interrupt
disable
0
0
R/W
R/W
Constantly "0" when
being read
PTM1
1
1
0
0
Priority level
PTM0
1
0
1
0
Level 3
Level 2
Level 1
Level 0
