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S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
OSCCON
— Oscillator Control Register
Bit Identifier
Reset Value
Read/Write
Addressing Mode
.7
.6–.4
.3
.2
.1
.0
.7
.6
0
–
R/W
–
Register addressing mode only
Sub Oscillator Circuit Selection Bit
0
Initial state
1
Power saving circuit for sub oscillator (Automatically cleared to "0" when the
sub oscillator is stopped by OSCCON.2).
NOTES:
1.
The OSCCON.7 must be maintained to "1", during the sub oscillator operation.
2.
A capacitor (0.1uF) should be connected between V
Not used for the S3C8275X/C8278X/C8274X
Main Oscillator Control Bit
0
Main oscillator RUN
1
Main oscillator STOP
Sub Oscillator Control Bit
0
Sub oscillator RUN
1
Sub oscillator STOP
Not used for the S3C8275X/C8278X/C8274X
System Clock Selection Bit
0
Select main oscillator for system clock
1
Select sub oscillator for system clock
.5
.4
.3
–
–
0
–
–
R/W
CONTROL REGISTER
E0H
Set 1, Bank 0
.2
.1
0
–
R/W
–
and GND.
REG
.0
0
R/W
4-21
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