Details Of Control Register - Epson S1C88655 Technical Manual

13.9 Details of Control Register

Table 13.9.1 shows the programmable timer control bits.
Address Bit Name
00FF20 D7 PRPRT1
D6 PST12
D5 PST11
D4 PST10
D3 PRPRT0
D2 PST02
D1 PST01
D0 PST00
00FF21 D7 PRPRT3
D6 PST32
D5 PST31
D4 PST30
D3 PRPRT2
D2 PST22
D1 PST21
D0 PST20
00FF23 D7 –
D6 –
D5 –
D4 –
D3 PRTF3
D2 PRTF2
D1 PRTF1
D0 PRTF0
S1C88655 TECHNICAL MANUAL
Table 13.9.1(a) Programmable timer control bits
Function
Programmable timer 1 clock control
Programmable timer 1 division ratio
PST12 PST11 PST10 (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 0 clock control
Programmable timer 0 division ratio
PST02 PST01 PST00 (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 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
–
–
–
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
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
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
EPSON
13 PROGRAMMABLE TIMER
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
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
– R
– Constantly "0" when
– R
– being read
– R
–
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
105