參數(shù)資料
型號: EM73469
廠商: ELAN Microelctronics Corp .
英文描述: Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示的工作電壓1.2V-1.8V的單片4位微控制器)
中文描述: 單芯片的CMOS 4位微控制器的LCD產(chǎn)品(用于液晶顯示的工作電壓1.2伏,1.8伏的單片4位微控制器)
文件頁數(shù): 20/33頁
文件大?。?/td> 187K
代理商: EM73469
20
* This specification are subject to be changed without notice.
EM73469
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
COM3
COM2
COM1
bit3
bit2
bit1
7.17.1998
Preliminary
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
PROGRAM EXAMPLE :
LDIA
#0001B
; 1/4 duty, 1/2 bias
OUTA
P27
LDIA
#1001B
; enable LCD
OUTA
P27
bit3
COM3
-
-
-
bit2
COM2
COM2
-
-
bit1
COM1
COM1
COM1
-
bit0
COM0
COM0
COM0
COM0
V
DD
V3
V2
V1
V
SS
VA
VB
4.5V
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
Frame
V3
V2
V1
V3
V2
V1
Vss
-V1
-V3
V3
V2
V1
Vss
-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)
1.5V
3V
V
DD
V3
V2
V1
V
SS
VA
VB
4.5V
1.5V
3V
VDD=1.5V
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 :
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