2 POWER SUPPLY, RESET, AND CLOCKS
S1C17F13 TeChniCal Manual
Seiko epson Corporation
2-17
(Rev. 1.0)
Each bit corresponds to the clock source as follows:
CLGINTF.OSC3ASTAIF bit: OSC3A oscillator circuit
CLGINTF.OSC1STAIF bit: OSC1 oscillator circuit
CLGINTF.OSC3BSTAIF bit: OSC3B oscillator circuit
Note: The CLGINTF.OSC3BSTAIF bit is 0 after system reset is canceled, but OSC3BCLK has al-
ready been stabilized.
ClG interrupt enable Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGINTE
15–8 –
0x00
–
R
–
7–3 –
0x0
–
R
2
OSC3ASTAIE
0
H0
R/W
1
OSC1STAIE
0
H0
R/W
0
OSC3BSTAIE
0
H0
R/W
Bits 15–3 Reserved
Bit 2
OSC3aSTaie
Bit 1
OSC1STaie
Bit 0
OSC3BSTaie
These bits enable the oscillation stabilization waiting completion interrupt of each clock source.
1 (R/W): Enable interrupts
0 (R/W): Disable interrupts
Each bit corresponds to the clock source as follows:
CLGINTE.OSC3ASTAIE bit: OSC3A oscillator circuit
CLGINTE.OSC1STAIE bit: OSC1 oscillator circuit
CLGINTE.OSC3BSTAIE bit: OSC3B oscillator circuit
ClG FOuT Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGFOUT
15–8 –
0x00
–
R
–
7
–
0
–
R
6–4 FOUTDIV[2:0]
0x0
H0
R/W
3–2 FOUTSRC[1:0]
0x0
H0
R/W
1
–
0
–
R
0
FOUTEN
0
H0
R/W
Bits 15–7 Reserved
Bits 6–4
FOuTDiV[2:0]
These bits set the FOUT clock division ratio.
Bits 3–2
FOuTSRC[1:0]
These bits select the FOUT clock source.
6.8 FOUT Clock Source and Division Ratio Settings
Table 2.
CLGFOUT.
FOUTDIV[2:0] bits
CLGFOUT.FOUTSRC[1:0] bits
0x0
0x1
0x2
0x3
OSC3BCLK
OSC1CLK
OSC3ACLK
SYSCLK
0x7
1/128
1/32,768
1/128
Reserved
0x6
1/64
1/4,096
1/64
Reserved
0x5
1/32
1/1,024
1/32
Reserved
0x4
1/16
1/256
1/16
Reserved
0x3
1/8
1/8
1/8
Reserved
0x2
1/4
1/4
1/4
Reserved
0x1
1/2
1/2
1/2
Reserved
0x0
1/1
1/1
1/1
1/1