Osccon — oscillator control register, Osccon – Samsung S3C8275X User Manual
Page 91
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
CONTROL
REGISTER
4-21
OSCCON
— Oscillator Control Register
E0H
Set 1, Bank 0
Bit
Identifier
.7 .6 .5 .4 .3 .2 .1 .0
Reset Value
0 – – – 0 0 – 0
Read/Write
R/W – – – R/W
R/W – R/W
Addressing Mode
Register addressing mode only
.7
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
REG
and GND.
.6–.4
Not used for the S3C8275X/C8278X/C8274X
.3
Main Oscillator Control Bit
0
Main oscillator RUN
1
Main oscillator STOP
.2
Sub Oscillator Control Bit
0
Sub oscillator RUN
1
Sub oscillator STOP
.1
Not used for the S3C8275X/C8278X/C8274X
.0
System Clock Selection Bit
0
Select main oscillator for system clock
1
Select sub oscillator for system clock