参数资料
| 型号： | AC164127-9 |
| 厂商： | Microchip Technology |
| 文件页数： | 8/34页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO GRAPH TRULY7 800X480 |
| 标准包装： | 1 |
| 系列： | PICtail™ Plus |
| 主要目的： | 显示器，LCD 显示器 |
| 已用 IC / 零件： | S1D13517 |
| 主要属性： | 7" WVGA TFT LCD |
| 次要属性： | 电阻式 4 线触控屏幕 |
| 已供物品： | 模块 |
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AN1368
TABLE 2:
BASIC COMPONENTS
Options
A . The frame buffer and display
controller are housed in a single
module, called the ‘Display Module’.
The microcontroller and display
module interface through a serial or
parallel interface. (1)
B . The frame buffer is housed
together with the display controller.
The microcontroller and graphics
controller communicate through a
serial or parallel interface, whereas
the graphics controller interfaces to
the display glass through an RGB
interface. (1)
C . The frame buffer and display
controller are housed inside the
microcontroller. The microcontroller
interfaces to the display glass
through an RGB interface.
Instead of a display controller, a
combination of a parallel interface
and a DMA engine can be used as
well.
D . The display controller is housed
inside the microcontroller. Separate
RAM is used as the frame buffer.
The microcontroller interfaces to the
Advantages
? No specific IC is required for graphics
functionality
? Less system components and less PCB
space
? Software driver change is not required if
the display glass is changed. Only a
compile-time configuration change may be
needed.
? Can be cheaper than Option A
? Only one IC is required for graphics
functionality
? Small form factor
? Usually the cheapest option
? Faster rendering since the memory is inside
the microcontroller
? Software driver change is not required if the
display module is changed. Only a
compile-time configuration change may be
needed.
? The microcontroller can support the
maximum display size possible as the size
of the frame buffer can be selected by the
user
Disadvantages
? Generally higher cost
? Usually forces a
software driver change
if the display module is
changed
? May lack additional
memory required for
double-buffering,
animation, etc.
? More system compo-
nents and more PCB
space
? Display size is limited
by the frame buffer
inside the display
controller
? Display size is limited
by the frame buffer
inside the
microcontroller
? Requires an extra IC
chip for the frame
buffer
display glass (display panel) through ? Usually cheaper than Option A and B
an RGB interface and interfaces with
the frame buffer through a parallel
interface.
Instead of a display controller, a
combination of a parallel interface
and a DMA engine can be used as
well.
Note 1:
A serial connection can be used on low resolution displays with low color depth (e.g., 1 BPP, 120x64). With
higher resolutions, the speed can be a bottleneck.
For Options A and B, the Microchip Graphics Library
currently supports PIC24, dsPIC ? and PIC32
microcontrollers with PMP or EPMP. The
PIC24FJXXXDAXXX family can support Options C and
D. PIC24FJ256DA210 contains 96 Kbytes of internal
memory and has a graphics controller inside. It also
DS01368A-page 8
supports optional external RAM as a frame buffer with
a parallel interface through the EPMP module. For
more information on the device, refer to the respective
device data sheet and also Section 43. “Graphics
Controller Module (GFX)” (DS39731) from the
“PIC24F Family Reference Manual” .
? 2011 Microchip Technology Inc.
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