Datasheet > AT76C101

AT76C101

更新时间： 2024-01-23 23:05:20

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
13页	114K
描述
JPEG Image Compression Processor

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

AT76C101 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Transferred	零件包装代码：	QFP
包装说明：	QFP, QFP100(UNSPEC)	针数：	100
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.78	商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	R-PQFP-G100	JESD-609代码：	e0
长度：	20 mm	功能数量：	1
端子数量：	100	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	QFP	封装等效代码：	QFP100(UNSPEC)
封装形状：	RECTANGULAR	封装形式：	FLATPACK
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	3.3 V
认证状态：	Not Qualified	座面最大高度：	3.4 mm
子类别：	Other Consumer ICs	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	14 mm	Base Number Matches：	1

AT76C101 数据手册

AT76C101

The Huffman tables have the same format in both the com-

pression and decompression mode, but the arrangement of

the codes within the tables varies for the two modes. In the

compression mode, the Huffman tables are indexed by the

8-bit symbol corresponding to the code. For example, the

luminance AC Huffman table value corresponding to the 8-

bit symbol value of 17 will be stored in the 17th location of

the table, i.e. in the address locations 4068 to 4071. In the

decompression mode, the Huffman tables are arranged in

consecutive locations in increasing order of Huffman size.

All codes of the same Huffman size are then arranged in

terms of increasing Huffman code value. Appendix A,

annex C of the JPEG International Standard gives the pro-

cedure for generating the Huffman codes and sizes from

the Huffman table information extracted from the com-

pressed JPEG header.

MaxMin Table Loading

The Maxmin tables are an extra set of tables which are

required only for the decompression operation. Similar to

the Huffman tables, these tables can be loaded only after

the INT_Table_Load_Enable register has been set, and

this register has to be reset before normal operation of the

AT76C101 can commence. This table is required to keep

track of the maximum and minimum Huffman code values

for each Huffman code length. Since there is a maximum of

4 Huffman tables allowed and the longest Huffman code is

16 bits wide, the required maxmin table size is 64 words.

The four maxmin tables are arranged in increasing order of

size and each word of the maxmin table is 40 bits wide with

three fields, a pointer to the position of the minimum code

of that Huffman size, the minimum Huffman code and the

maximum Huffman code corresponding to that Huffman

code size. The maxmin tables are accessed by the host

bus in terms of five 8-bit slices with the lowest address cor-

responding to bit 0-7 of the maxmin table value and the

highest address corresponding to bit 32-39 (Figure 4).

These tables are generated from the AT76C101 specific

decompression mode Huffman tables and the algorithm to

develop them is given below:

for (i = 1..16) begin

maxmin_min_code[i] = -1

maxmin_max_code[i] = -1

end

for (i=1..total_num_of_huffman_codes)

if (maxmin_min_code[size[i]] == -1)

begin

maxmin_min_code[size[i]] = code[i]

maxmin_val_ptr[size[i]] = i

end

maxmin_max_code[size[i]] = code[i]

1...4 5 678 9 10...13

下载PDF

与AT76C101相关器件

型号	品牌	描述	获取价格	数据表
AT76C10-DM	ETC	Digitally Controlled Gain Amplifier	获取价格
AT76C10E-DM	ETC	Digitally Controlled Gain Amplifier	获取价格
AT76C10E-PC	ETC	Digitally Controlled Gain Amplifier	获取价格
AT76C10E-PI	ETC	Digitally Controlled Gain Amplifier	获取价格
AT76C10E-SC	ETC	Digitally Controlled Gain Amplifier	获取价格
AT76C10E-SI	ETC	Digitally Controlled Gain Amplifier	获取价格

与AT76C101相关文章

pcf8563芯片功能说明、参数分析、引脚说明
2024-05-25

6
TDA2822资料手册：引脚说明、参数分析
2024-05-25

4
TJA1050资料数据分析、引脚说明、应用示例介绍
2024-05-24

10
DS3231时钟芯片：参数分析、引脚说明、应用示例介绍
2024-05-24

8

产品中心

服务支持

精选活动

关于我们

帮助中心

AT76C101

AT76C101 技术参数

AT76C101 数据手册

与AT76C101相关器件

与AT76C101相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AT76C101

AT76C101 技术参数

AT76C101 数据手册

与AT76C101相关器件

与AT76C101相关文章

您还可以找

您在本页遇到什么问题？