HD404629R Datasheet, PDF (10/157 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a DTMF Generator Circuit

HD404629R Series
Item
A/D
converter
Symbol
AV_CC
AV_SS
DTMF
AN₀–AN₃
TONER
TONEC
VT_ref
Pin Number
FP-100B
TFP-100B
FP-100A I/O
1
3
6
8
2–5
4–7
I
99
1
O
98
100
O
100
2
Function
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
Ground for AV_CC: Connect it to the same potential
as GND, as physically close to the GND pin as
possible
Analog input pins for A/D converter
Output pin for DTMF row signals
Output pin for DTMF column signals
Reference voltage pin for DTMF signals.
Voltage conditions are: V_CC ≥ VT_ref ≥ GND
8