HYUNDAI MicroElectronics
GMS81C2012/GMS81C2020
Oscillator
(XI pin)
Internal
RC Clock
Internal
Clock
External
Interrupt
( or WDT Interrupt )
Clear Basic Interval Timer
STOP Instruction Execution
BIT
Counter
N-1
N
N+1
N+2
N-2
00
01
FE FF 00
00
Normal Operation
Stabilization Time
tST > 20mS
RCWDT Mode
Normal Operation
Figure 17-5 Internal RCWDT Mode Releasing by External Interrupt or WDT Interrupt
RCWDT Mode
Oscillator
(XI pin)
Internal
RC Clock
Internal
Clock
RESET
RESET by WDT
Internal
RESET
STOP Instruction Execution
Stabilization Time
ST = 64mS @4MHz
Time can not be control by software
t
Figure 17-6 Internal RCWDT Mode Releasing by RESET
17.5 Minimizing Current Consumption
ciated with the oscillator and the internal hardware is low-
ered; however, the power dissipation associated with the
pin interface (depending on the external circuitry and pro-
gram) is not directly determined by the hardware operation
of the STOP feature. This point should be little current flows
when the input level is stable at the power voltage level
(VDD/VSS); however, when the input level becomes higher
The Stop mode is designed to reduce power consumption.
To minimize current drawn during Stop mode, the user
should turn-off output drivers that are sourcing or sinking
current, if it is practical.
Note: In the STOP operation, the power dissipation asso-
MAR. 2000 Ver 1.00
83
HYNIX [ HYNIX SEMICONDUCTOR ]
