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SN66090
4-Channel Speech Controller
INTRODUCTION
SN66090 is a 90 seconds single chip 4-channel voice synthesizer IC which
contains I/O ports 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
90 seconds voice capacity are provided
One 4-bit input port, two 4-bit I/O ports and one 4-bit output port are
provided
128*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)
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PIN ASSIGNMENT
Symbol I/O Function Description
P10 I Bit0 of input port 1
P11 I Bit1 of input port 1
P12 I Bit2 of input port 1
P13 I Bit3 of input port 1
P20 I/O Bit0 of I/O port 2
P21 I/O Bit1 of I/O port 2
P22 I/O Bit2 of I/O port 2
P23 I/O Bit3 of I/O port 2
P30 I/O Bit0 of I/O port 3
SN66090
4-Channel Speech Controller
P31 I/O Bit1 of I/O port 3
P32 I/O Bit2 of I/O port 3
P33 I/O Bit3 of I/O port 3
P40 O Bit0 of output port 4
P41 O Bit1 of output port 4
P42 O Bit2 of output port 4
P43 O Bit3 of output port 4
V
DD
I Positive power supply
GND I Negative power supply
OSC/XIN I Oscillator / Crystal In
XOUT O Crystal Out
CKSEL I Clock type select
‘L’ → R type (1M)
‘H’ → 2M Crystal
Internal pull low.
VO1 O D/A current output, for channel 1 and 2
VO2 O D/A current output, for channel 3 and 4
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4-Channel Speech Controller
ABSOLUTE MAXIMUM RATING
Items Symbol Min Max Unit.
Supply Voltage VDD-V -0.3 6.0 V
SN66090
Input Voltage V
Operating Temperature T
Storage Temperature T
IN
OP
STG
VSS-0.3 VDD+0.3 V
-20.0 70.0
-55.0 125.0
ELECTRICAL CHARACTERISTICS
Item Sym. Min. Typ. Max. Unit Condition
Operating Voltage V
Standby Current I
Operating Current I
Input Current of P1 I
Drive Current of P2, P3,
P4
Sink Current of P2,P3,P4 I
SBY
OPR
I
2.4 3.0 5.1 V
DD
--1.0uAVDD=3V
- - 350
IH
OD
OS
- 3.0 10.0
1.5 2 -
2.0 3 -
o
C
o
C
u
AVDD=3V, no load
u
AVDD=3V,VIN=3V
m
AVDD=3V,VO=2.4V
m
AVDD=3V,VO=0.4V
VO1/VO2 Output Current I
Oscillation Freq. F
VO
OSC
2.0 3.0 4.0
m
AVDD=3V,VO=0.7V
-2.0-MHzVDD=3V
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BONDING PAD
SN66090
4-Channel Speech Controller
SN66090
Note: The substrate MUST be connected to Vss in PCB layout.
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SN66090
4-Channel Speech Controller
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