
HD404629R Series
8
Pin Number
Item
Symbol
FP-100B
TFP-100B
FP-100A
I/O
Function
A/D
converter
AV
CC
1
3
Power pin for A/D converter: Connect it to the same
potential as V
CC
, as physically close to the V
CC
pin as
possible
AV
SS
6
8
Ground for AV
CC
: Connect it to the same potential
as GND, as physically close to the GND pin as
possible
AN
0
–AN
3
2–5
4–7
I
Analog input pins for A/D converter
DTMF
TONER
99
1
O
Output pin for DTMF row signals
TONEC
98
100
O
Output pin for DTMF column signals
VT
ref
100
2
Reference voltage pin for DTMF signals.
Voltage conditions are: V
CC
≥
VT
ref
≥
GND