STSAFE-A120 datasheet(34/38 Pages) STMICROELECTRONICS

34 / 38 page

Contents

Description ........................................................................3

1.1

Key function overview........................................................... 3

1.2

STSAFE-A120 environment...................................................... 4

Product use cases .................................................................5

2.1

Authentication ................................................................. 5

2.2

Applicative data storage ......................................................... 6

2.3

Local envelope wrapping/unwrapping ............................................. 6

2.4

Key establishment for secure connection (TLS) ..................................... 8

2.5

Entity authentication ............................................................ 9

2.6

Public key signature verification ................................................. 10

2.7

Symmetric signature, verification, encryption, and decryption with keys from the

symmetric key table ........................................................... 11

Pairing with local host ............................................................12

Command sets ...................................................................15

4.1

General-purpose commands .................................................... 15

4.2

Random generation ........................................................... 15

4.3

Data hashing commands ....................................................... 15

4.4

Private and public key commands ............................................... 15

4.5

Local envelope commands ..................................................... 16

4.6

Data-partition commands ....................................................... 16

4.7

Symmetric key table commands ................................................. 16

Standby mode ....................................................................18

Electrical integration..............................................................19

6.1

VCC control through a transistor ................................................. 19

6.2

VCC supply through a GPIO .................................................... 19

Electrical characteristics..........................................................20

7.1

Absolute maximum ratings...................................................... 20

7.2

Power supply ................................................................. 20

7.2.1

Power supply specifications ............................................... 20

7.2.2

Power-on and power-off sequences, and power supply glitch tolerance .............. 21

7.2.3

Reset pin (external reset) ................................................. 21

7.2.4

Power-on and reset sequence ............................................. 21

7.2.5

Power consumption optimization............................................ 22

7.3

DC characteristics ............................................................. 22

STSAFE-A120

Contents

DS14609 - Rev 1

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