Microchip PIC24FJ128DA110 Manual

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Side 1/76

Graphics Controller

Module (GFX)

Section 43. Graphics Controller Module (GFX)

HIGHLIGHTS

This section of the manual contains the following topics:

43.1 Introduction .................................................................................................................. 43-2

43.2 Module Registers ......................................................................................................... 43-4

43.3 Operation ................................................................................................................... 43-27

43.4 Display Controller....................................................................................................... 43-34

43.5 Graphical Processing Units (GPUs)........................................................................... 43-49

43.6 Interrupts.................................................................................................................... 43-65

43.7 Display Power Sequencing ........................................................................................ 43-67

43.8 Operation in Power-Saving Modes ............................................................................ 43-68

43.9 Effects of a Reset.......................................................................................................43-69

43.10 Display Interface Timing............................................................................................. 43-70

43.11 Register Map.............................................................................................................. 43-74

43.12 Related Application Notes.......................................................................................... 43-75

43.13 Revision History ......................................................................................................... 43-76

PIC24F Family Reference Manual

43.1 INTRODUCTION

The Graphics Controller (GFX) module is specifically designed to directly interface with display

glasses, with built-in analog drive, to individually control pixels in the screen. The module also pro-

vides accelerated rendering of vertical and horizontal lines, rectangles, copying of a rectangular

area between different locations on the screen, drawing texts and decompressing compressed

data. The use of the accelerated rendering is performed using command FIFO. Once initiated, the

hardware will perform the rendering freeing up the CPU for other tasks. Software can either poll the

status or use interrupts to continue rendering succeeding shapes.

43.1.1 GFX Module Features

The GFX module supports three categories of display glasses:

• Monochrome STN

• Color STN

• Color TFT

Programmable vertical and horizontal synchronization signals’ timing is provided to meet the

display’s timing requirements.

The GFX module includes the following features:

• Graphics Hardware Accelerators:

- Character Graphics Processing Unit (CHRGPU)

- Rectangle Copy Graphics Processing Unit (RCCGPU)

- Inflate Processing Unit (IPU)

• 256 Color Look-up Table (CLUT) Entries

• Supports 1/2/4/8/16 bits-per-pixel (bpp) Color Depth

• Programmable Display Resolution

• Supports the following Display Interfaces:

- 4/8/16-Bit Monochrome STN

- 4/8/16-Bit Color STN

- 9/12/18/24-Bit Color TFT (18 and 24-bit displays are connected as 16-bit 5-6-5 RGB

color format)

Figure 43-1 illustrates the GFX module pinout and image buffer sources. In some devices,

system RAM can also reside externally to the device. Refer to the applicable device data sheet

for details.

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	PIC24FJ128DA110

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