AT88SC102 查看數據表（PDF） - Unspecified

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AT88SC102

1K EEPROM– Security Logic with Two Application Zones

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AT88SC102

matches the password bit by bit as the CLK increments the address through the password mem-

ory addresses.

Figure 3-1. Block Diagram

VCC

GND

Power On

Reset

RST

CLK

PGM

Address

Counter

E2PROM

Memory

FUS

Security Logic

I/O

The AT88SC102 is manufactured using low-power CMOS technology and features its own inter-

nal high-voltage pump for single voltage supply operation. The devices are guaranteed to

100,000 erase/write cycles and 10-year data retention. The AT88SC102 supports the ISO/IEC

7816-3 synchronous protocol.

4. Security Features

The security features of Atmel’s AT88SC102 include:

• Data access only after validation of the security code.

• Permanent invalidation of the device after four consecutive false security code presentations.

• Read/write protection of certain memory zones.

• Secure transport of devices using transport code compare sequence.

• Unique customer identification number written and locked into every device for protection

against duplication or counterfeiting.

4.1 Security Levels and Memory Access to AT88SC102

Access to the memory is controlled by the state of the issuer fuse and by the voltage supply

applied on the FUS pad.

Table 1.

FUS Pad

Logic “0”

Logic “1”

Logic “1”

Issuer Fuse

X

1

0

Security Level

2

1

2

3

1419C–SMEM–6/08

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