EM73PA88A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
(3) LCD waveform : (1/5 bias)
S
* TYPE A :
* TYPE B :
COM0
E
G
0
COM0
V5
V4
V3
V2
V1
Vss
V5
V4
V3
V2
V1
Vss
COM0
: ON
: OFF
COM1
SEG0
COM1
COM15
SEG0
SEG0-COM0
ON
SEG0-COM0
ON
SEG0-COM1
OFF
SEG0-COM1
OFF
Frame freq.=64Hz
Frame freq.=64Hz
(4) LCD drive voltage :
• The LCD bias voltage is supplied by voltage multiplier. The application circuit is illustated as below :
0.1µF
VA
VB
V5
V4
V3
V2
V1
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
SPEECH SYNTHESIZER
Set sound freq.
Set sound mode
Set sound effect amplitude
P17 Write
P23,24 Write
P30 Write
D/A
BZ1
BZ2
PWM
Sound effect generator
speech
ROM
speech
decoder
SPI interrupt
P5.3 read
Speech active
P7 Write
P7 Read
P6 Write
P5 Write
Set data address
(write 5 times)
Set speech address
(write 4 times)
Read data
Set sample rate
Block diagram of speech and sound effect
* This specification are subject to be changed without notice.
10.8.2001
25
ELAN [ ELAN MICROELECTRONICS CORP ]
