參數(shù)資料
型號: 20-101-0732
廠商: Rabbit Semiconductor
文件頁數(shù): 51/126頁
文件大?。?/td> 0K
描述: INTERFACE SMART SCREEN OP7100
標準包裝: 1
系列: SBC
模塊/板類型: 單板計算機模塊
適用于相關(guān)產(chǎn)品: OP7100
其它名稱: 20-101-732
20-101-732-ND
OP7100
30
Hardware
Liquid Crystal Display (LCD)
The 240 × 320 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
R31
2.5 k
-
+
Manual
Software Contrast
Adjustment
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