Samsung KS57C2308 manual Scmod System Clock Mode Control Register, FB7H, 1Bit

MEMORY MAPKS57C2308/P2308/C2316/P2316

SCMOD — System Clock Mode Control Register FB7H

Bit

Identifier

RESET Value

Read/Write

Bit Addressing

3	2	1	0
.3	.2	"0"	.0
0	0	0	0
W	W	W	W
1	1	1	1

.3, .2 and .0	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

.1Bit 1

0 Always logic zero

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.

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