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SD Specifications Part 1 Physical Layer Specification version 2.00.pdf
SD2.0完整版协议。适合驱动工程师调试使用。SD主从机设计等。
2018-08-28
Portable Network Graphics (PNG) Specification (Second Edition)
Portable Network Graphics (PNG) Specification (Second Edition)
This document describes PNG (Portable Network Graphics), an extensible file format for the lossless, portable, well-compressed storage of raster images.
PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are
supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits.
2016-03-19
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