SN65020
One Channel Direct Drive Speech Controller
INTRODUCTION
SN65020 is a 20 seconds one-channel single chip voice synthesizer IC which
contains a PWM Direct Drive Circuit. There is one 4-bit I/O port and built in a
tiny controller. By programming through the tiny controller, user’s applications
including section combination, trigger modes, output status, and other logic
functions can be easily implemented.
FEATURES
Single power supply 2.4V – 5.1V
20 seconds voice capacity is provided
Built in a tiny controller
One 4-bit I/O port is provided
64*4 bit RAM are provided
Maximum 16k program ROM is provided
Readable ROM code data
Built in a high quality speech synthesizer
Adaptive playing speed from 2.5k-20kHz is provided
Built in a PWM Direct Drive circuit output BUO1 and BUO2 directly
connected to Speaker for sound output
System clock :1MHZ
PIN ASSIGNMENT
Symbol
P20
P21
P22
P23
V
DD
OSC
TEST
GND
BUO1
BUO2
I/O
I/O
I/O
I/O
I/O
I
I
I
I
O
O
Function Description
Bit0 of I/O port 2
Bit1 of I/O port 2
Bit2 of I/O port 2
Bit3 of I/O port 2
Positive power supply
Oscillation component connection pin
For testing only
Negative power supply
PWM output 1
PWM output 2
1
December 20, 2000
SN65020
One Channel Direct Drive Speech Controller
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5
December 20, 2000
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