GMS81C1102 Datasheet, PDF (70/89 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C1102 / GMS81C1202
Oscillator
(X_IN pin)
Internal
RC Clock
Internal
Clock
RESET
RESET by WDT
Internal
RESET
RCWDT Mode
STOP Instruction Execution
Time can not be controlled by software
Stabilization Time
t_ST = 64mS @4MHz
Figure 21-6 Internal RCWDT Mode Releasing by RESET.
INPUT PIN
V_DD
VDD
V_DD
internal
pull-up
i
GND
X
Weak pull-up current flows
O
V_DD
OPEN
O
INPUT PIN
V_DD
OPEN
i
i=0
O
Very weak current flows
X
i=0
GND
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
ON
OFF _i
GND
X
ON
OPEN
OFF
O
VDD
ON
O ^OFF
In the left case, much current flows from port to GND.
OUTPUT PIN
ON
OFF _i
V_DD
L
GND
OFF
ON i=0
VDD
L
GND
X
O
In the left case, Tr. base current flows from port to GND.
To avoid power consumption, there should be low output
to the port .
Figure 21-8 Application Example of Unused output Port
Jan. 2002 ver 2.0
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