MEMORY MAP KS57C2308/P2308/C2316/P2316
4-26
SCMOD — System Clock Mode Control Register FB7H
Bit 3 2 1 0
Identifier .3 .2 "0" .0
RESET Value 0 0 0 0
Read/Write W W W W
Bit Addressing 1 1 1 1
.3, .2 and .0 CPU Clock Selection and Main System Clock Oscillation Control Bits
000Select main system clock (fx); enable main system clock
001Select sub system clock (fxt); enable main system clock
010Select main system clock (fx); disable sub system clock
101Select sub system clock (fxt); disable main system clock
.1 Bit 1
0Always 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.