Eeram; Push Button; Leds - Sferalabs Iono Pi Max v2 3+ Lite User Manual

✓ Networking key management support
✓ Turnkey PRF/HKDF calculation for TLS 1.2 & 1.3
✓ Ephemeral key generation and key agreement in SRAM – Small message
encryption with keys entirely protected
✓ Secure boot support
✓ Full ECDSA code signature validation, optional stored digest/signature –
optional communication key disablement prior to secure boot
✓ Encryption/Authentication for messages to prevent on-board attacks
✓ Internal high-quality FIPS 800-90 A/B/C Random Number Generator (RNG)
✓ Two high-endurance monotonic counters
✓ Guaranteed unique 72-bit serial number.
Note that, while by default the ATECC608 is connected to the Pi's I2C bus, it could be re-
routed, using custom firmware, to the SAME54 I2C bus (DMZ_I2C).

EERAM

Iono Pi Max has a Microchip 47L16 16 Kbit SRAM with EEPROM Backup. This chip
combines the persistent storage characteristics of a traditional EEPROM, without the
limitations in terms of number of erase cycles. It is connected to the SAME54 I2C bus
(DMZ_I2C).

Push button

Iono Pi Max has a user-configurable push button on the front panel. When this button is
pressed, the Iono Pi Max controller will set GPIO38 high, so that an application can easily
detect it by simply polling this GPIO line. The button status is also available reading the
sysfs button/status file.

LEDs

Iono Pi Max has five RGB LEDs visible through the front panel. At power-up, all these
LEDs briefly turn on green.
An additional blue LED on the bottom and top circuit boards, that is not visible from the
outside, flashes continuously when Iono Pi Max is powered and the SAME54 control
firmware is running. It remains steadily on when the firmware is not running
(microcontroller reset or not programmed, or critical firmware error conditions).
Of the five front panel RGB LEDs, four are assigned by default to specific functions: PWR,
for power and system status, RS-232, RS-485 and CAN TX (blue) / RX (green) activity.
The USR LED is not associated to a specific function, but reserved for user control.
Besides the default functions, all LEDs can be overridden and controlled by application
software.
33 Iono Pi Max User Guide