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Other peripherals
TPM
Cesta v operačním systému:
/run/unipi-plc/by-sys/tpm/dev
Podrobnosti:
- Trusted Platform Module 2.0
- Výrobce: Infineon
- Čip: OPTIGA SLB 9672 FW16
- Sběrnice: spi6
Čip TPM poskytuje kryptografické funkce pro zabezpečení hardwarové identity a integrity zařízení. Obsahuje unikátní klíče a obsahuje certifikáty výrobce a vlastní klíče pro ověření totožnosti jednotky.
| Cesta v OS | /run/unipi-plc/by-sys/tpm/dev |
%hide technické parametry
| Verze TPM | Trusted Platform Module 2.0 |
| Sběrnice | SPI (33 MHz) |
TPM technical parameters
Cesta v operačním systému:
/run/unipi-plc/by-sys/tpm/dev
Podrobnosti:
- Trusted Platform Module 2.0
- Výrobce: Infineon
- Čip: OPTIGA SLB 9672 FW16
- Sběrnice: spi6
Čip TPM poskytuje kryptografické funkce pro zabezpečení hardwarové identity a integrity zařízení. Obsahuje unikátní klíče a obsahuje certifikáty výrobce a vlastní klíče pro ověření totožnosti jednotky.
| Cesta v OS | /run/unipi-plc/by-sys/tpm/dev |
%hide technické parametry
| Verze TPM | Trusted Platform Module 2.0 |
| Sběrnice | SPI (33 MHz) |
Retain
Retain memory is a fast non-volatile memory used for storing current values of chosen variables. It is separated from eMMC storage and thus do not reduce the lifespan of the main storage.
| Path in the OS | /run/unipi-plc/by-sys/retain/mem |
Retain technical parameters
| Memory size | 128 kB (default) |
| Memory type | FRAM |
| Bus | SPI (30 MHz) |
| Lifespan | 1013 times / byte |
RTC
RTC (Real-time clock) can keep track of elapsed time, even when the device is powered off or is not connected to internet.
| Path in the OS | /dev/rtc |
RTC technical parameters
| Battery | CR2032 lithium battery |
| Calibrated | Yes |
| Bus | I2C |
| Lifetime | approx. 10 years |
Hardware Watchdog
Note:
Dedicated watchdog and Master watchdog (MWD) are two separate systems!
While dedicated watchdog monitors if the operating system is running correctly, the MWD is present only for variants with I/O and monitors communication with I/O board.
Each unit contains dedicated watchdog. If either system deamon (systemd) or kernel (Linux) hangs, it can reset the compute module and lower IO boards by power cycling them. This watchdog is turn on by default, therefor no set up for the watchdog is needed.
Service button
Input device emulating the ENTER key. It is also used to access the service mode.
| Path in the OS | /dev/input/event0 |
ULED
User programmable LEDs which can be set to indicate any event or state. They can be controlled from the user program or directly from OS.
| Path in the OS | /run/unipi-plc/by-sys/ULEDx/brightness |
Note:
Replace x with ULED number.
| Color | Green |
| Off value | 0 |
| On value | 1 (or any other than 0) |
