
III PERIPHERAL BLOCK: PRESCALER
S1C33L01 FUNCTION PART
EPSON
B-III-2-3
I/O Memory of Prescaler
Table 2.3 shows the control bits of the prescaler.
Table 2.3
Control Bits of Prescaler
Name
Address
Register name
Bit
Function
Setting
Init.
R/W
Remarks
–
–
P8TPCK3
P8TPCK2
P8TPCK1
P8TPCK0
D7–4
D3
D2
D1
D0
reserved
8-bit timer 3 clock selection
8-bit timer 2 clock selection
8-bit timer 1 clock selection
8-bit timer 0 clock selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
0040146
(B)
1
θ/1
0 Divided clk.
1
θ/1
0 Divided clk.
1
θ/1
0 Divided clk.
1
θ/1
0 Divided clk.
8-bit timer
clock select
register
–
–
P16TON0
P16TS02
P16TS01
P16TS00
D7–4
D3
D2
D1
D0
reserved
16-bit timer 0 clock control
16-bit timer 0
clock division ratio selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
16-bit timer 0 can be
used as a watchdog
timer.
0040147
(B)
1 On
0 Off
1
0
1
0
1
0
1
0
1
0
1
0
1
0
P16TS0[2:0]
Division ratio
θ/4096
θ/1024
θ/256
θ/64
θ/16
θ/4
θ/2
θ/1
16-bit timer 0
clock control
register
–
–
P16TON1
P16TS12
P16TS11
P16TS10
D7–4
D3
D2
D1
D0
reserved
16-bit timer 1 clock control
16-bit timer 1
clock division ratio selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
0040148
(B)
1 On
0 Off
1
0
1
0
1
0
1
0
1
0
1
0
1
0
P16TS1[2:0]
Division ratio
θ/4096
θ/1024
θ/256
θ/64
θ/16
θ/4
θ/2
θ/1
16-bit timer 1
clock control
register
–
–
P16TON2
P16TS22
P16TS21
P16TS20
D7–4
D3
D2
D1
D0
reserved
16-bit timer 2 clock control
16-bit timer 2
clock division ratio selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
0040149
(B)
1 On
0 Off
1
0
1
0
1
0
1
0
1
0
1
0
1
0
P16TS2[2:0]
Division ratio
θ/4096
θ/1024
θ/256
θ/64
θ/16
θ/4
θ/2
θ/1
16-bit timer 2
clock control
register
–
–
P16TON3
P16TS32
P16TS31
P16TS30
D7–4
D3
D2
D1
D0
reserved
16-bit timer 3 clock control
16-bit timer 3
clock division ratio selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
004014A
(B)
1 On
0 Off
1
0
1
0
1
0
1
0
1
0
1
0
1
0
P16TS3[2:0]
Division ratio
θ/4096
θ/1024
θ/256
θ/64
θ/16
θ/4
θ/2
θ/1
16-bit timer 3
clock control
register
–
–
P16TON4
P16TS42
P16TS41
P16TS40
D7–4
D3
D2
D1
D0
reserved
16-bit timer 4 clock control
16-bit timer 4
clock division ratio selection
–
0
–
R/W
0 when being read.
θ: selected by
Prescaler clock select
register (0x40181)
004014B
(B)
1 On
0 Off
1
0
1
0
1
0
1
0
1
0
1
0
1
0
P16TS4[2:0]
Division ratio
θ/4096
θ/1024
θ/256
θ/64
θ/16
θ/4
θ/2
θ/1
16-bit timer 4
clock control
register