List of figures

Figure 1.

Authentication to a remote server (connected device case) ..................................... 3

Figure 2.

Authentication to a local host (consumable or peripheral case) ................................... 3

Figure 3.

Example of IoT device authentication .................................................... 5

Figure 4.

Example of peripheral device authentication ................................................ 6

Figure 5.

General principle of the wrapping/unwrapping key ........................................... 6

Figure 6.

Wrap/unwrap local envelop command flow ................................................ 8

Figure 7.

Key establishment command flow ....................................................... 9

Figure 8.

Example of entity authentication ....................................................... 10

Figure 9.

Public key signature verification command flow............................................. 11

Figure 10.

Host secure channel ............................................................... 12

Figure 11.

Host secure channel setup case for plaintext host keys provisioning .............................. 13

Figure 12.

Host secure channel setup case for wrapped host keys provisioning .............................. 14

Figure 13.

STSAFE-A120 wake up from STANDBY ................................................. 18

Figure 14.

STSAFE-A120 standby entry ......................................................... 18

Figure 15.

STSAFE-A120 VCC pin control with a transistor ............................................ 19

Figure 16.

STSAFE-A120 VCC pin supply through a GPIO............................................. 19

Figure 17.

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

Figure 18.

Warm reset sequence .............................................................. 21

Figure 19.

AC clock and data timings ........................................................... 23

Figure 20.

SO8N pinout - top view ............................................................. 25

Figure 21.

UFDFPN8 pinout 1- top view ......................................................... 25

Figure 22.

UFDFPN8 pinout 2- top view ......................................................... 25

Figure 23.

SO8N – Outline .................................................................. 26

Figure 24.

SO8N - footprint example............................................................ 27

Figure 25.

UFDFPN8 - Outline ................................................................ 28

Figure 26.

UFDFPN8 - 8-lead, 2 × 3 mm, 0.5 mm pitch ultra thin profile fine pitch dual flat footprint example .......... 29

Figure 27.

S08N tape and reel ................................................................ 30

Figure 28.

DFN8 tape and reel................................................................ 30

STSAFE-A120

List of figures

DS14609 - Rev 1

page 37/38