2 POWER SUPPLY, RESET, AND CLOCKS
S1C31D50/D51 TECHNICAL MANUAL
Seiko Epson Corporation
2-21
(Rev. 2.00)
CLG Interrupt Flag Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGINTF
15–9 –
0x00
–
R
–
8
OSC3TERIF
0
H0
R/W Cleared by writing 1.
7
–
0
–
R
–
6
(reserved)
0
H0
R
5
OSC1STPIF
0
H0
R/W Cleared by writing 1.
4
OSC3TEDIF
0
H0
R/W
3
–
0
–
R
–
2
OSC3STAIF
0
H0
R/W Cleared by writing 1.
1
OSC1STAIF
0
H0
R/W
0
IOSCSTAIF
0
H0
R/W
Bits 15–9, 7, 6, 3 Reserved
Bit 8
OSC3TERIF
Bit 5
OSC1STPIF
Bit 4
OSC3TEDIF
Bit 2
OSC3STAIF
Bit 1
OSC1STAIF
Bit 0
IOSCSTAIF
These bits indicate the CLG interrupt cause occurrence statuses.
1 (R):
Cause of interrupt occurred
0 (R):
No cause of interrupt occurred
1 (W):
Clear flag
0 (W):
Ineffective
Each bit corresponds to the interrupt as follows:
CLGINTF.OSC3TERIF bit: OSC3 oscillation auto-trimming error interrupt
CLGINTF.OSC1STPIF bit: OSC1 oscillation stop interrupt
CLGINTF.OSC3TEDIF bit: OSC3 oscillation auto-trimming completion interrupt
CLGINTF.OSC3STAIF bit: OSC3 oscillation stabilization waiting completion interrupt
CLGINTF.OSC1STAIF bit: OSC1 oscillation stabilization waiting completion interrupt
CLGINTF.IOSCSTAIF bit: IOSC oscillation stabilization waiting completion interrupt
Note: The CLGINTF.IOSCSTAIF bit is 0 after system reset is canceled, but IOSCCLK has already
been stabilized.
CLG Interrupt Enable Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGINTE
15–9 –
0x00
–
R
–
8
OSC3TERIE
0
H0
R/W
7
–
0
–
R
6
(reserved)
0
H0
R/W
5
OSC1STPIE
0
H0
R/W
4
OSC3TEDIE
0
H0
R/W
3
–
0
–
R
2
OSC3STAIE
0
H0
R/W
1
OSC1STAIE
0
H0
R/W
0
IOSCSTAIE
0
H0
R/W
Bits 15–9, 7, 6, 3 Reserved