GMS81C1102 / GMS81C1202
RCWDT Mode
Oscillator
(X pin)
IN
Internal
RC Clock
Internal
Clock
RESET
RESET by WDT
Internal
RESET
STOP Instruction Execution
Stabilization Time
tST = 64mS @4MHz
Time can not be controlled by software
Figure 21-6 Internal RCWDT Mode Releasing by RESET.
INPUT PIN
VDD
INPUT PIN
VDD
VDD
VDD
internal
pull-up
OPEN
i=0
i=0
i
O
O
i
Very weak current flows
VDD
GND
X
GND
X
OPEN
Weak pull-up current flows
O
O
When port is configured as an input, input level should
be closed to 0V or 5V to avoid power consumption.
Figure 21-7 Application Example of Unused Input Port
OUTPUT PIN
OUTPUT PIN
ON
VDD
ON
VDD
OPEN
L
L
OFF
ON
OFF
ON
O
i=0
OFF
OFF
i
i
VDD
GND
GND
GND
ON
X
O
X
OFF
In the left case, Tr. base current flows from port to GND.
To avoid power consumption, there should be low output
to the port .
O
In the left case, much current flows from port to GND.
Figure 21-8 Application Example of Unused output Port
Jan. 2002 ver 2.0
67
HYNIX [ HYNIX SEMICONDUCTOR ]
