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SN69040
LCD Controller with Voice/Dual Tone Melody
INTRODUCTION
SN69040 is a single chip voice/dual tone melody synthesizer IC with 4*32 LCD
direct drive capability which contains two 4-bit I/O ports, two optional 4-bit output
ports and a tiny controller. By programming through the tiny controller, user’s
applications including LCD display, section combination, trigger modes, output
status, voice/melody playing and other logic functions and then be easily
implemented.
FEATURES
Single power supply 2.4V - 5V
Built in a tiny controller
Two 4-bit I/O ports and two optional 4-bit output ports are provided
Built in 40K*10 ROM
256*4 bits RAM for programming usage are provided
32*4 bits RAM for LCD display usage are provided
Maximum 16k program ROM is provided
Readable ROM code data
Built in direct 4*32 LCD driver
LCD 1/3 bias, 1/4 duty
Built in a high quality speech synthesizer
Adaptive playing speed from 2.5k-40kHz is provided
Built in a dual tone melody generator
Speech/Dual tone melody mixer is provided which SN69040 can play speech
and dual tone melody simultaneously
Fixed current D/A output is provided to drive external connected transistor for
sound output
PWM output is provided to drive external connected piezo buzzer
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PIN ASSIGNMENT
Symbol I/O Function Description
SEG1-SEG24 O segment 1~24 for LCD driver
SN69040
LCD Controller with Voice/Dual Tone Melody
SEG25/P53-SE
G28/P50
SEG29/P43-SE
G32/P40
COM1-COM4 O Com1-Com4 for LCD driver.
GND I Negative power supply.
P33-P30 I/O Bit 3 to bit 0 of IO port 3.
P23-P20 I/O Bit 3 to bit 0 of IO port 2.
BU1,BU2 O Buzzer driver outputs.
VO O D/A current output.
RST I Reset pin with internal pull low.
OSC I Oscillation component connection pin.
O Optional to be SEG25-SEG28 or P53-P50
SEG25-28: segment25~28 for LCD driver.
P53-P50: Bit3-bit0 for output port 5.
O Optional to be SEG29~SEG32 or P43-P40
SEG29~32: segment29~32 for LCD driver.
P43~P40: Bit3-bit0 for output port 4.
TEST I For testing only.
XIN,XOUT 32768 Hz Crystal connection pins.
VDD I Positive power supply.
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LCD Controller with Voice/Dual Tone Melody
ABSOLUTELY MAXIMUM RATING
Items Symbol Min Max Unit.
Supply Voltage VDD-V -0.3 6.0 V
Input Voltage VIN VSS-0.3 VDD+0.3 V
SN69040
Operating
TOP -20.0 70.0 oC
Temperature
Storage Temperature T
STG
ELECTRICAL CHARACTERISTIC
Item Sym. Min. Typ. Max. Unit Condition
Operating Voltage VDD 2.4 3.0 5.1 V
Standby current 1 I
Standby current 2 I
Operating Current I
Input current
of ,P2,P3
Drive current of
P2,P3,P4,P5
large Sink current
of P2,P3,P4,P5
Small Sink current
of P2,P3,P4,P5
D/A output current IVO 2.0 3.0 4.0 mA VDD=3V,VO=0.7V
Buzzer drive
current
Buzzer sink current I
Oscillation resistor R - 1.0 - MHz VDD=3V
Oscillation Freq. F
- - 1.0 uA VDD=3V,both system clk and
SBY1
- 20 50 uA VDD=3V, system clk is off,
SBY2
- 350 500 uA VDD=3V, no load
OPR
IIH - 3.0 10.0 uA VDD=3V,VIN=3V
IOD -1.5 -2 - mA VDD=3V,VO=2.6V
I
2.0 3 - mA VDD=3V,VO=0.4V
OS1
I
- 0.4 - uA VDD=3V,VO=0.4V
OS2
I
-15 mA VDD=3V,VO=1.5V
BZD
15 mA VDD=3V,VO=1.5V
BZS
- 1.0 - MHz VDD=3V
OSC
-55.0 125.0 oC
32768 Hz clk are off
32768 Hz clk is on for LCD
display and timer.
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BONDING PAD
SN69040
LCD Controller with Voice/Dual Tone Melody
SN69040
Note: The substrate MUST be connected to Vss in PCB layout.
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SN69040
LCD Controller with Voice/Dual Tone Melody
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The application circuits illustrated in this document are for reference purposes only.
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equipment or medical life support equipment, are specifically not recommended
without additional processing by SONIX for such application.
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