參數(shù)資料
型號(hào): EM73461A
廠商: ELAN Microelctronics Corp .
英文描述: 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
中文描述: 4位微控制器的液晶產(chǎn)品
文件頁(yè)數(shù): 20/33頁(yè)
文件大小: 190K
代理商: EM73461A
20
* This specification are subject to be changed without notice.
EM73461A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
COM3
COM2
COM1
bit3
bit2
bit1
1.5.2001
RAM
address
20H
21H
22H
:
:
3EH
3FH
COM0
bit0
SEG0
SEG1
SEG2
:
:
SEG30
SEG31
The relation between LCD display data and driving method
Driving method
1/4 duty
1/3 duty
1/2 duty
Static
LCD frame frequency : According to the drive method to set the frame frequency.
Duty
Frame frequency (Hz)
1/4 duty
64 x (4/4) = 64
1/3 duty
64 x (4/3) = 85
1/2 duty
64 x (4/2) = 128
Static
64
bit3
COM3
-
-
-
bit2
COM2
COM2
-
-
bit1
COM1
COM1
COM1
-
bit0
COM0
COM0
COM0
COM0
V
DD
V3
V2
V1
V
SS
3V
2V
1V
VA
VB
V
DD
V3
V2
V1
V
SS
4.5V
3V
1.5V
VA
VB
V
DD
V3
V2
V1
V
SS
3V
2V
1V
VA
VB
V
DD
V3
V2
V1
V
SS
4.5V
3V
1.5V
VA
VB
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
V3
V2
V1
Vss
-V1
-V2
-V3
V3
V2
V1
Vss
-V1
-V2
-V3
Frame
V3
V2
V1
Vss
V3
V2
V1
Vss
-V1
-V2
-V3
V3
V2
V1
Vss
-V1
-V2
-V3
Frame
COM0
COM1
COM2
COM3
SEG0
SEG0-COM0
ON
SEG0-COM1
OFF
(1) 1/4 duty (1/3 bias)
(2 ) 1/3 duty (1/3 bias)
VDD=3V
LCD DRIVING METHODS
There are six kinds of driving methods can be selected by DUTY (P27.0~P27.2). The drivinf waveforms of
LCD driver are as below :
PROGRAM EXAMPLE :
LDIA
#0001B
OUTA
P27
LDIA
#1001B
OUTA
P27
; 1/4 duty, 1/2 bias
; enable LCD
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