4
Table 1.1
Features (cont)
Item
Description
A/D converter
8-bit successive-approximations A/D converter using a resistance ladder
•
4-channel analog input port
•
Conversion time: 31/ø, 62/ø or 124/ø per channel
DTMF generator
Built-in tone dialer supporting OSC clock frequencies from 1.2 MHz to 10 MHz
in 400-kHz steps
14-bit PWM
Pulse-division PWM to reduce ripple
•
Can be used as a 14-bit D/A converter by connecting a low-pass filter
externally
Product lineup
Product Code
Mask ROM
Version
ZTAT™
Version
Package
ROM/RAM Size
HD6433637F
HD6473637F
80-pin QFP
(FP-80B)
ROM: 60 kbytes
RAM: 2 kbytes
HD6433637X
HD6473637X
80-pin TQFP
(TFP-80F)
HD6433637W
HD6473637W
80-pin TQFP
(TFP-80C)
HD6433636F
—
80-pin QFP
(FP-80B)
ROM: 48 kbytes
RAM: 2 kbytes
HD6433636X
—
80-pin TQFP
(TFP-80F)
HD6433636W
—
80-pin TQFP
(TFP-80C)
HD6433635F
—
80-pin QFP
(FP-80B)
ROM: 40 kbytes
RAM: 2 kbytes
HD6433635X
—
80-pin TQFP
(TFP-80F)
HD6433635W
—
80-pin TQFP
(TFP-80C)