參數(shù)資料
型號: μSAP70300-B03
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數(shù): 67/102頁
文件大?。?/td> 282K
代理商: ΜSAP70300-B03
57
CHAPTER 2 LIBRARY SPECIFICATIONS
(3) Analysis
For details of how to use the analysis library when the APPn marker is supported, see
Section 2.2.3
.
2.4 DATA CONVERSION/TRANSFER BETWEEN VRAM-MCU BUFFERS
The following figure outlines the processing performed for the library.
Figure 2-9. Data Conversion/Transfer between VRAM-MCU Buffers
With JPEG compression, the MCU is the basic unit of processing (for details of the MCU, see
Section 2.4.2
).
Compression involves conversion from VRAM data to MCU, while expansion involves conversion from MCU
to VRAM data.
The library provides functions for converting or transferring data between the VRAM-MCU buffers in MCU
units by default.
The user can create his or her own functions by using these conversion routines (such as when a
monochrome image is to be displayed). For details, see
Section 2.10
.
Conversion
to MCU data
JPEG
compression
Library
JPEG file
VRAM
xxx.jpg
(a) Compression
Conversion
to VRAM
data
JPEG
expansion
xxx.jpg
JPEG file
Library
VRAM
(b) Expansion
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