Page 1
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
Page 2
PIN ASSIGNMENT
SN6A297
LCD Controller with Voice/Dual Tone Melody
Symbol
SEG1-SEG40
COM8-COM1
GND
P23-P20
P33-P30
P43-P40
VO
RESET
OSC
TEST
XIN,XOUT
V
DD
VLCDR
I/O Function Description
O Segment 1~40 for LCD driver.
O
I/O Bit 3 to bit 0 of IO port 2.
I/O Bit 3 to bit 0 of IO port 3.
O
O
Com8-Com1 for 8*40 LCD driver.
I
Negative power supply.
Bit 3 to bit 0 of IO port 4.
D/A current output.
I
Reset pin with internal pull low.
I
Oscillation component connection pin.
I
For testing only.
32768 Hz Crystal connection pins.
I
Positive power supply.
LCD voltage adjusting pin.
VLC1, VLC2,
VLC3, VLC4
LCD voltage bias connection pins.
2
May 24, 2001
Page 3
LCD Controller with Voice/Dual Tone Melody
ABSOLUTELY MAXIMUM RATING
Items Symbol Min Max Unit.
Supply Voltage VDD-V -0.3 6.0 V
SN6A297
Input Voltage V
Operating Temperature T
Storage Temperature T
IN
OP
STG
ELECTRICAL CHARACTERISTIC
Item Sym. Min. Typ. Max. Unit Condition
Operating
Voltage
Standby current 1 I
Standby current 2 I
Operating
current
Input current of
,P2,P3
Drive current
of P2,P3,P4,P5
large Sink current
of P2,P3,P4
Small Sink current
of P2,P3,P4
D/A output current I
Oscillation
resistor
Oscillation Freq. F
V
SBY1
SBY2
I
OPR
I
I
I
OS1
I
OS2
2.4 3.0 5.1 V
DD
--1.0uAVDD=3V,both system clk
-2050uAVDD=3V, system clk is off,
- 350 500
IH
OD
- 3.0 10.0
-1.5 -2 -
2.0 3 -
-0.4-uAVDD=3V,VO=0.4V
2.0 3.0 4.0
VO
R - 330K -
OSC
-1.0-MHZVDD=3V
VSS-0.3 VDD+0.3 V
-20.0 70.0
-55.0 125.0
o
o
and 32768 Hz clk are off
32768 Hz clk is on for LCD
display and timer.
AVDD=3V, no load
u
AVDD=3V,VIN=3V
u
AVDD=3V,VO=2.6V
m
AVDD=3V,VO=0.4V
m
AVDD=3V,VO=0.7V
m
VDD=3V
Ω
C
C
3
May 24, 2001
Page 4
BONDING PAD
SN6A297
LCD Controller with Voice/Dual Tone Melody
SN6A297
Note: The substrate MUST be connected to Vss in PCB layout.
4
May 24, 2001
Page 5
APPLICATION CIRCUIT
SN6A297
LCD Controller with Voice/Dual Tone Melody
Note:
1. LCD driving capacity: 1/4 duty, 1/4 bias
2. R1~R4 is the bias resisters.
3. R5 is by-pass resister, from 680KΩ~1KΩ.
5
May 24, 2001
Page 6
SN6A297
LCD Controller with Voice/Dual Tone Melody
DISCLAIMER
The information appearing in SONiX web pages (“this publication”) is believed to be
accurate.
However, this publication could contain technical inaccuracies or typographical
errors.
The reader should not assume that this publication is error-free or that it will be
suitable for any particular purpose. SONiXmakes no warranty, express, statutory
implied or by description in this publication or other documents which are referenced
by or linked to this publication. In no event shall SONiX be liable for any special,
incidental, indirect or consequential damages of any kind, or any damages
whatsoever, including, without limitation, those resulting from loss of use, data or
profits, whether or not advised of the possibility of damage, and on any theory of
liability, arising out of or in connection with the use or performance of this
publication or other documents which are referenced by or linked to this publication.
This publication was developed for products offered in Taiwan. SONiX may not
offer the products discussed in this document in other countries. Information is
subject to change without notice. Please contact SONiX or its local representative
for information on offerings available. Integrated circuits sold by SONiX are covered
by the warranty and patent indemnification provisions stipulated in the terms of sale
only.
The application circuits illustrated in this document are for reference purposes only.
SONIX DISCLAIMS ALL WARRANTIES, INCLUDING THE WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PURPOSE. SONIX reserves the right
to halt production or alter the specifications and prices, and discontinue marketing
the Products listed at any time without notice. Accordingly, the reader is cautioned
to verify that the data sheets and other information in this publication are current
before placing orders.
Products described herein are intended for use in normal commercial applications.
Applications involving unusual environmental or reliability requirements, e.g. military
equipment or medical life support equipment, are specifically not recommended
without additional processing by SONIX for such application.
6
May 24, 2001
Loading...