Pin Assignment
LC7461M
Top view
Pin Description
Pin Name
VDD, VSS
KO0 to KO7
Pin No.
8, 12
13 to 20
Input/Output
Output
Internal Equivalent Circuit
Pin Function
Power supply pins VSS = GND
Key scan timing signal output pins
KI0 to KI3
1 to 4
Input
OSC1
OSC2
10
11
Input/output
C0 to C5
21 to 24,
5, 6
Input
Keys return signal entry pins
Input/output pins for ceramic resonator-used
oscillation
Oscillator configuration
Input pins for custom code setting
Capable of externally setting 6 bits of 13 bits in
all that provide a custom code
OUT
7
Output
Output pin for transmit LED drive
TEST
9
Input
LSI test pin
Normally set to high-level or brought to open
state
No.2119-3/7