11-7
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
11.6.
Control Registers
SVD3 Clock Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
SVD3CLK
15
–
9
–
0x00
–
R
–
8
DBRUN
1
H0
R/WP
7
–
0
–
R
6
–
4
CLKDIV[2:0]
0x0
H0
R/WP
3
–
2
–
0x0
–
R
1
–
0
CLKSRC[1:0]
0x0
H0
R/WP
Bits 15
–
9
Reserved
Bit 8
DBRUN
This bit sets whether the SVD3 operating clock is supplied in DEBUG mode or not.
1 (R/WP): Clock supplied in DEBUG mode
0 (R/WP): No clock supplied in DEBUG mode
Bit 7
Reserved
Bits 6
–
4
CLKDIV[2:0]
These bits select the division ratio of the SVD3 operating clock.
Bits 3
–
2
Reserved
Bits 1
–
0
CLKSRC[1:0]
These bits select the clock source of SVD3.
Table 11.6.1 Clock Source and Division Ratio Settings
SVD3CLK. CLKDIV[2:0] bits
SVD3CLK.CLKSRC[1:0] bits
0x0
0x1
0x2
0x3
IOSC
OSC1
OSC3
EXOSC
0x7, 0x6
Reserved
1/1
Reserved
1/1
0x5
1/512
1/512
0x4
1/256
1/256
0x3
1/128
1/128
0x2
1/64
1/64
0x1
1/32
1/32
0x0
1/16
1/16
(Note) The oscillation circuits/external input that are not supported in this IC cannot be
selected as the clock source.
Note:
The clock frequency should be set to around 32 kHz.
Summary of Contents for S1C31D50
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