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ATA555814-DDW

更新时间： 2024-02-25 20:49:11

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
42页	672K
描述
1 kbit R/W IDIC with Deterministic Anticollision

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技术参数
数据手册

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ATA555814-DDW 技术参数

生命周期：	Obsolete	包装说明：	DIE, DIE OR CHIP
Reach Compliance Code：	unknown	风险等级：	5.84
JESD-30 代码：	X-XUUC-N	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	UNSPECIFIED
封装代码：	DIE	封装等效代码：	DIE OR CHIP
封装形状：	UNSPECIFIED	封装形式：	UNCASED CHIP
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子位置：	UPPER	uPs/uCs/外围集成电路类型：	MICROPROCESSOR CIRCUIT
Base Number Matches：	1

ATA555814-DDW 数据手册

2.7.3

Master Key

The Master Key controls various operating modes as described in Table 2-2. For production test

purposes, other Master Key codes are used, but once the Configuration block has been double

locked these test functions can never be reactivated.

If the Master Key is set to 0110, the blocks within the system memory section have different

access protection (see Figure 2-5 on page 7). These access rights are fixed and not influenced

by the Page Security Register. Access to password protected system memory blocks can only

be performed after the corresponding LoginWrite or LoginRead has been successfully executed.

The password blocks themselves are non-readable. Traceability and configuration can always be

read but the traceability data cannot be altered.

Table 2-2.

Master Key Related Functions

Enables

Protection Scheme

User Memory

Clear

Page

Security

System

Memory

Master Key

DDR

yes

EAS

yes

others

A new ATA5558 device, when received by the customer can be considered as being unpro-

grammed (all 0 state), the only exception to this being the preprogrammed non-alterable

traceability information. For the tag manufacturer to be able to easily set up the tag passwords, it

is possible to provisionally switch the password protection off. i.e Master Key = 0. In this state, it

is possible to read and write all non-locked (lock bits = 0) memory blocks irrespective of the

page security. In this way, new tag passwords or Tag ID’s can be defined and written. Blocks,

which have once been locked (block lock bit = 1) can however not be rewritten. When the cus-

tomer has completed the tag configuration, the Master Key is set to the “safe” state (= 6) thus

enabling the full password protection, and then finally the configuration block itself may be

locked. In this double locked condition, the configuration and all other locked blocks are irrevers-

ibly set and cannot be changed. This applies to both the user and the majority of the system

memory blocks.

ATA5558 [Preliminary]

4681C–RFID–09/05

1...5 6 789 10 11...42

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