POWER-DOWN KS57C2308/P2308/C2316/P2316
8-2
Table 8-1. Hardware Operation During Power-Down Modes
Mode Main Stop Sub Stop Main/Sub Stop Idle
System clock Main clock (fx) Sub clock (fxt) Main clock (fx) (1) Main (fx) or sub clock
(fxt)
Instruction STOP Setting SCMOD.2 to
“1” STOP IDLE
Clock oscillator Main clock oscillation
stops Sub clock oscillation
stops Main clock oscillation
stops Only CPU clock
stops. (2)
Basic timer Basic timer stops. Basic timer stops. Basic timer stops. Basic timer operates.
Serial I/O
interface operates only if
external SCK is
selected as serial
clock
operates only if
external SCK is
selected as serial
clock
operates only if
external SCK is
selected as serial
clock
operates only if a
clock other than the
CPU clock is selected
as the serial clock.
Timer/counter 0Operates only if
TCL0 is selected as
counter clock.
Operates only if
TCL0 is selected as
counter clock.
Operates only if
TCL0 is selected as
counter clock.
Timer/counter 0
operates.
Watch timer Operates only if sub
clock (fxt) is selected
as counter clock.
Watch timer stops. Watch timer stops. Watch timer
operates.
LCD controller Operates only if sub
clock (fxt) is selected
as LCD clock,
LCDCK.
LCD controller stops. LCD controller stops. LCD controller
operates.
External
interrupts INT1 and INT2 are
acknowledged; INT0
is not serviced.
INT0, INT1, and INT2
is not serviced. INT1 and INT2 are
acknowledged; INT0
is not serviced.
INT1 and INT2 are
acknowledged; INT0
is not serviced.
CPU All CPU operations are disabled.
Mode release
signal Interrupt request
signals (except INT0)
pre-enabled by IEx or
RESET input.
Only RESET input Interrupt request signals (except INT0)
pre-enabled by IEx or RESET input.
NOTES:
1. Sub clock stops by setting SCMOD.2 to “1”.
2. Main and sub clock oscillation continues.