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Tone Melody. SN6A297 Datasheet |
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SN6A297
LCD Controller with Voice/Dual Tone Melody
INTRODUCTION
SN6A297 is a single chip voice/dual tone melody synthesizer IC with 8*40 direct
drive capability which contains two 4-bit I/O ports, one 4-bit output port and a
tiny controller. By programming through the tiny controller, user’s application
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 – 5.1V
Built in a tiny controller
Two 4-bit I/O ports are provided, one 4-bit output ports are provided
272*4 bits RAM for programming usage are provided (page0~15, m8~m15
of page18 and page21)
80*4 bits RAM for LCD display usage are provided
Maximum 108k*10 program ROM is provided
Readable ROM code data
Built in direct 8*40 LCD driver
LCD 1/4 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 SN6A297 can play
speech and dual tone melody simultaneously
Fixed current D/A output is provided to drive external connected transistor
for sound output
1 May 24, 2001
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SN6A297
LCD Controller with Voice/Dual Tone Melody
PIN ASSIGNMENT
Symbol
I/O
SEG1-SEG40 O
COM8-COM1
O
GND
I
P23-P20
I/O
P33-P30
I/O
P43-P40
O
VO O
RESET
I
OSC
I
TEST
I
XIN,XOUT
VDD
VLCDR
I
VLC1, VLC2,
VLC3, VLC4
Function Description
Segment 1~40 for LCD driver.
Com8-Com1 for 8*40 LCD driver.
Negative power supply.
Bit 3 to bit 0 of IO port 2.
Bit 3 to bit 0 of IO port 3.
Bit 3 to bit 0 of IO port 4.
D/A current output.
Reset pin with internal pull low.
Oscillation component connection pin.
For testing only.
32768 Hz Crystal connection pins.
Positive power supply.
LCD voltage adjusting pin.
LCD voltage bias connection pins.
2 May 24, 2001
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SN6A297
LCD Controller with Voice/Dual Tone Melody
ABSOLUTELY 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 CHARACTERISTIC
Item
Sym. Min. Typ. Max. Unit
Condition
Operating
Voltage
VDD 2.4 3.0 5.1 V
Standby current 1 ISBY1 -
- 1.0 uA VDD=3V,both system clk
and 32768 Hz clk are off
Standby current 2 ISBY2 -
20 50 uA VDD=3V, system clk is off,
32768 Hz clk is on for LCD
display and timer.
Operating
current
IOPR - 350 500 uA VDD=3V, no load
Input current of
,P2,P3
IIH
- 3.0 10.0 uA VDD=3V,VIN=3V
Drive current IOD -1.5 -2
of P2,P3,P4,P5
- mA VDD=3V,VO=2.6V
large Sink current IOS1 2.0
of P2,P3,P4
3
- mA VDD=3V,VO=0.4V
Small Sink current IOS2 - 0.4 - uA VDD=3V,VO=0.4V
of P2,P3,P4
D/A output current IVO 2.0 3.0 4.0 mA VDD=3V,VO=0.7V
Oscillation
resistor
R - 330K - Ω VDD=3V
Oscillation Freq. FOSC - 1.0 - MHZ VDD=3V
3 May 24, 2001
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