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MEMORY MAP
SCMOD
— System Clock Mode Control Register
Bit
Identifier
Value
RESET
Read/Write
Bit Addressing
.3, .2 and .0
.1
NOTE:
SCMOD bits 3 and 0 cannot be modified simultaneously by a 4-bit instruction; they can only be modified by
separate 1-bit instructions.
4-26
3
2
.3
.2
0
0
W
W
1
1
CPU Clock Selection and Main System Clock Oscillation Control Bits
0
0
0
Select main system clock (fx); enable main system clock
0
0
1
Select sub system clock (fxt); enable main system clock
0
1
0
Select main system clock (fx); disable sub system clock
1
0
1
Select sub system clock (fxt); disable main system clock
Bit 1
0
Always logic zero
1
0
"0"
.0
0
0
W
W
1
1
KS57C2308/P2308/C2316/P2316
FB7H
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