OP7100
30 Hardware
Liquid Crystal Display (LCD)
The 240 × 320 ¼ VGA LCD supports both graphics and text. Automatic
contrast control is built in so that the contrast, once set, does not drift as
the OP7100 warms up or is moved.
Figure 3-4 provides a block diagram of the LCD control and RAM circuits.
Figure 3-4. Block Diagram LCD Control and Memory
The LCD is connected to the OP7100
circuit board through header J1 or J3
on the circuit board.
Contrast Adjustment
Figure 3-5 shows the location of the
manual contrast adjustment. This con-
trast adjustment is the factory default for
the OP7110. The OP7100 is configured
with software contrast control as the fac-
tory default. With software contrast con-
trol, the contrast level may be set via a
software function call. Since it is hard
to guess the correct level in software,
buttons defined on the OP7100 touch-
screen and in software can be used to
adjust the contrast. A user-supplied key-
pad can facilitate this type of software
control for the OP7110.
CONTRAST
Figure 3-5. Location of OP7100
Manual Contrast Adjustment
U2
VCC
VRAMCS1
A[0–14]
/CS
VCC
D[0–7]
RAM
U1
VCC
VRAMCS2
A[0–14]
/CS
VCC
D[0–7]
RAM
U3
VA [0–14]
VD [0–7]
FRAME
ON/OFF
/RESET
SED1335F
LCD Control
XD[0–3]
/INT0
D [0–7]
A0
FRAME
XD[0–3]
VCC
ON/OFF
LCD
VEE
ADJUST
VCC
R26
10 k
Ω
R31
2.5 k
Ω
-
+
Manual
Software Contrast
Adjustment
Содержание OP7100
Страница 1: ...OP7100 Serial Graphic Display User s Manual 019 0065 070831 O ...
Страница 10: ...OP7100 x About This Manual ...
Страница 16: ...OP7100 16 Overview ...
Страница 51: ...OP7100 Software 51 CHAPTER 4 SOFTWARE Chapter 4 describes the Dynamic C functions used with the OP7100 ...
Страница 74: ...OP7100 74 Software ...
Страница 82: ...OP7100 82 Graphics Programming ...
Страница 88: ...OP7100 88 Installation ...
Страница 98: ...OP7100 98 Specifications ...
Страница 108: ...OP7100 108 Memory I O Map and Interrupt Vectors ...
Страница 112: ...112 Serial Interface Board 2 OP7100 ...
Страница 113: ...OP7100 Backup Battery 113 APPENDIX E BACKUP BATTERY ...
Страница 116: ...OP7100 116 Backup Battery ...
Страница 124: ...OP7100 124 Index ...
Страница 126: ...XX0000 Schematics ...