Power supply, Timing relationships and diagram – Purdy AND711AST-30/-EO User Manual
Page 2
Intelligent Graphics Display
AND711AST-30/-EO
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
7/20/07
Tel: 408.523.8200 • Fax: 408.733.1287 • [email protected] • www.purdyelectronics.com
2
Optical Characteristics (TA = 25˚C,
φ
= 0°,
θ
= 0)
Note: Refer to Applications Section for definitions of viewing
angle, contrast ratio, response time (on and off) and
luminance.
Power Supply
The LCD panel is driven by the voltage V
DD
–V
EE
, so an
adjustable V
EE
is required for contrast control and
temperature compensation.
Temperature Variations
Example of Variable Negative Voltage Supply
Timing Relationships and Diagram
Timing Diagram
Item
Symbol
Min.
Typ.
Max.
Unit
Viewing Angle
Right to Left
–
80
–
degree
Up & Down
–
55
–
Contrast
K
2.5
4.8
-
-
Turn On
T
on
-
200
350
ms
Turn Off
T
off
-
250
300
ms
Connector Pin Assignment
Pin No.
Signal
Function
1
FGND
Frame Ground (connected to metal bezel)
2
GND
Ground (signal)
3
V
DD
Power Supply for logic (5V)
4
V
EE
Power Supply for LCD Drive (–8.5 ±3V)
5
WR
Data Write
6
RD
Data Read
7
CE
Chip Enable
8
C/D
WR = “L”, C/D = “H”: Command Write
WR = “L”, C/D = “L”: Data Write
RD = “L”, C/D = “H”: Status Read
RD = “L”, C/D = “L”: Data Read
9
NC
No connection
10
RESET
Controller Reset (Active Pullup Required)
11
D0
Data Input/Output
12
D1
Data Input/Output
13
D2
Data Input/Output
14
D3
Data Input/Output
15
D4
Data Input/Output
16
D5
Data Input/Output
17
D6
Data Input/Output
18
D7
Data Input/Output
19
FS
Font select. Open or connect to V
DD
: 6 x 8 dot
Connect to ground: 8 x 8 dot
20
NC
No connection
Temperature
V
DD
–V
EE
0°C
13.9
+25°C
12.5
+50°C
10.8
Signal Timing Relationships
Item
Symbol
Min.
Max.
Unit
C/D Set Up Time
t
CDS
100
–
ns
C/D Hold Time
t
CDH
10
–
CE
,
RD
,
WR
Pulse Width
t
CE,
t
RD,
t
WR
80
–
Data Set Up Time
t
DS
80
–
Data Hold Time
t
DH
40
–
Access Time
t
ACC
–
150
Output Hold Time
t
OH
10
50
V
EE
V
DD
GND
LCD Module
R1
R2
R1 = 10k, R2 = 10k, T
R
2SA1102 or equivalent
T
R
t
CDS
t
CP
,t
RD
,t
WP
t
ACC
t
CDH
t
DH
t
OH
t
DS
C/D
CE
RD, WR
D0-D7
(WRITE)
D0-D7
(READ)