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
Version.1.01
September 26, 2002
1
SN69040
LCD Controller with Voice/Dual Tone Melody
PIN ASSIGNMENT
Symbol
I/O
Function Description
SEG1-SEG24
O
segment 1~24 for LCD driver
SEG25/P53-SE
G28/P50
O
Optional to be SEG25-SEG28 or P53-P50
SEG25-28: segment25~28 for LCD driver.
P53-P50: Bit3-bit0 for output port 5.
SEG29/P43-SE
G32/P40
O
Optional to be SEG29~SEG32 or P43-P40
SEG29~32: segment29~32 for LCD driver.
P43~P40: Bit3-bit0 for output port 4.
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.
TEST
I
For testing only.
XIN,XOUT
32768 Hz Crystal connection pins.
V
DD
I
Positive power supply.
Version.1.01
September 26, 2002
2
SN69040
LCD Controller with Voice/Dual Tone Melody
ABSOLUTELY MAXIMUM RATING
Items
Symbol
Min
Max
Unit.
Supply Voltage
V
DD
-V -0.3 6.0
V
Input Voltage
V
IN
V
SS
-0.3 V
DD
+0.3 V
Operating
Temperature
T
OP
-20.0 70.0
o
C
Storage Temperature
T
STG
-55.0 125.0
o
C
ELECTRICAL CHARACTERISTIC
Item
Sym. Min. Typ. Max. Unit
Condition
Operating Voltage V
DD
2.4 3.0 5.1 V
Standby current 1 I
SBY1
- - 1.0 uA V
DD
=3V,both system clk and
32768 Hz clk are off
Standby current 2 I
SBY2
- 20 50 uA V
DD
=3V, system clk is off,
32768 Hz clk is on for LCD
display and timer.
Operating Current I
OPR
- 350
500 uA V
DD
=3V, no load
Input current
of ,P2,P3
I
IH
- 3.0
10.0
uA V
DD
=3V,V
IN
=3V
Drive current of
P2,P3,P4,P5
I
OD
-1.5 -2 - mA V
DD
=3V,V
O
=2.6V
large Sink current
of P2,P3,P4,P5
I
OS1
2.0 3 - mA V
DD
=3V,V
O
=0.4V
Small Sink current
of P2,P3,P4,P5
I
OS2
- 0.4 - uA V
DD
=3V,V
O
=0.4V
D/A output current
I
VO
2.0 3.0 4.0 mA V
DD
=3V,V
O
=0.7V
Buzzer drive
current
I
BZD
-15 mA V
DD
=3V,V
O
=1.5V
Buzzer sink current I
BZS
15 mA
V
DD
=3V,V
O
=1.5V
Oscillation
resistor R - 1.0 - MHz
V
DD
=3V
Oscillation Freq.
F
OSC
-
1.0 - MHz
V
DD
=3V
Version.1.01
September 26, 2002
3
SN69040
LCD Controller with Voice/Dual Tone Melody
BONDING PAD
SN69040
Note: The substrate MUST be connected to Vss in PCB layout.
Version.1.01
September 26, 2002
4
SN69040
LCD Controller with Voice/Dual Tone Melody
Version.1.01
September 26, 2002
5
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