2 POWER SUPPLY, RESET, AND CLOCKS
S1C17M12/M13 TECHNICAL MANUAL
Seiko Epson Corporation
2-13
(Rev. 1.2)
CLG Oscillation Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGOSC
15–12 –
0x0
–
R
–
11 EXOSCSLPC
1
H0
R/W
10 OSC3SLPC
1
H0
R/W
9
–
0
–
R
8
IOSCSLPC
1
H0
R/W
7–4 –
0x0
–
R
3
EXOSCEN
0
H0
R/W
2
OSC3EN
0
H0
R/W
1
–
0
–
R
0
IOSCEN
1
H0
R/W
Bits 15–12, 9 Reserved
Bit 11
EXOSCSLPC
Bit 10
OSC3SLPC
Bit 8
IOSCSLPC
These bits control the clock source operations in SLEEP mode.
1 (R/W): Stop clock source in SLEEP mode
0 (R/W): Continue operation state before SLEEP
Each bit corresponds to the clock source as follows:
CLGOSC.EXOSCSLPC bit: EXOSC clock input
CLGOSC.OSC3SLPC bit: OSC3 oscillator circuit
CLGOSC.IOSCSLPC bit: IOSC oscillator circuit
Bits 7–4, 1 Reserved
Bit 3
EXOSCEN
Bit 2
OSC3EN
Bit 0
IOSCEN
These bits control the clock source operation.
1(R/W): Start oscillating or clock input
0(R/W): Stop oscillating or clock input
Each bit corresponds to the clock source as follows:
CLGOSC.EXOSCEN bit: EXOSC clock input
CLGOSC.OSC3EN bit: OSC3 oscillator circuit
CLGOSC.IOSCEN bit: IOSC oscillator circuit
CLG OSC3 Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGOSC3
15–12 –
0x0
–
R
–
11–10 OSC3FQ[1:0]
0x1
H0
R/WP
9–8 OSC3MD[1:0]
0x0
H0
R/WP
7–6 –
0x0
–
R
5–4 OSC3INV[1:0]
0x3
H0
R/WP
3
–
0
–
R
2–0 OSC3WT[2:0]
0x6
H0
R/WP
Bits 15–12 Reserved
Bits 11–10 OSC3FQ[1:0]
These bits set the oscillation frequency of the OSC3 internal oscillator circuit.