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Speech Controller. SN66021 Datasheet |
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SN66021
4-Channel Speech Controller
INTRODUCTION
SN66020 is a 20 seconds single chip 4-channel voice synthesizer IC which
contains I/O pins and a tiny controller. By programming through the tiny
controller, user’s applications including section combination, trigger modes,
output status, high performance melody, multiple voices, and other logic
functions can be implemented.
FEATURES
Single power supply 2.4V – 5.1V
Built in a tiny controller
20 seconds voice capacity are provided
One 4-bit input port, two 4-bit I/O ports and one 4-bit output port are
provided
256*4 bits RAM are provided
Maximum 64k program ROM is provided
Readable ROM code data
Built in a high quality speech synthesizer
Four independent voice channels
Adaptive playing speed from 4k-40kHz is provided for all 4 channels
individually
Automatic repetition for every channel
A 6-bit*8-bit Multiplier is embed to modulate the volume of synthesized
voices
Two digital mixers (with saturation control) are provided
Two 8-bit current output DA converters (Channel 1 + Channel 2 → DA1,
Channel 3 + Channel 4 → DA2 )
System clock: 2M Hz ( R-type or Crystal Option)
Low Voltage Reset
1 March 8, 2001
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SN66021
4-Channel Speech Controller
PIN ASSIGNMENT
Symbol
P10
P11
P12
P13
P20
P21
P22
P23
P30
P31
P32
P33
P40
P41
P42
P43
VDD
GND
I/O Function Description
I Bit0 of input port 1
I Bit1 of input port 1
I Bit2 of input port 1
I Bit3 of input port 1
I/O Bit0 of I/O port 2
I/O Bit1 of I/O port 2
I/O Bit2 of I/O port 2
I/O Bit3 of I/O port 2
I/O Bit0 of I/O port 3
I/O Bit1 of I/O port 3
I/O Bit2 of I/O port 3
I/O Bit3 of I/O port 3
O Bit0 of output port 4
O Bit1 of output port 4
O Bit2 of output port 4
O Bit3 of output port 4
I Positive power supply
I Negative power supply
OSC/XIN I Oscillator / Crystal In
XOUT O Crystal Out
CKSEL I Clock type select
‘L’ → RC oscillator
‘H’ →Crystal
VO1
(Internal pull low)
O D/A current output, for channel 1 and 2
VO2 O D/A current output, for channel 3 and 4
2 March 8, 2001
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SN66021
4-Channel Speech Controller
ABSOLUTE MAXIMUM RATING
Items
Symbol Min
Supply Voltage
Input Voltage
Operating Temperature
Storage Temperature
VDD-V
VIN
TOP
TSTG
-0.3
VSS-0.3
-20.0
-55.0
Max
6.0
VDD+0.3
70.0
125.0
Unit.
V
V
oC
oC
ELECTRICAL CHARACTERISTICS
Item
Sym. Min. Typ. Max. Unit Condition
Operating Voltage
Standby Current
Operating Current
Input Current of P1
Drive Current of P2, P3,
P4
Sink Current of P2,P3,P4
VO1/VO2 Output Current
Oscillation Freq.
VDD
ISBY
IOPR
IIH
IOD
2.4
-
-
-
1.5
IOS
IVO
FOSC
2.0
2.0
-
3.0 5.1 V
- 2.0 uA VDD=3V
- 350 uA VDD=3V, no load
3.0 10.0 uA VDD=3V,VIN=3V
2 - mA VDD=3V,VO=2.4V
3 - mA VDD=3V,VO=0.4V
3.0 4.0 mA VDD=3V,VO=0.7V
2.0 - MHz VDD=3V
3 March 8, 2001
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