Need clarification about EEPROM on Jetson Nano

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

@WayneWWW

Hi Team,

This below snippet is from Jetson nano dts(tegra210-porg-eeprom-manager.dtsi)
eeprom-manager {
data-size = <0x100>;
bus@0 {
i2c-bus = <&i2c1>;
word-address-1-byte-slave-addresses = <0x50>;
};
bus@1 {
i2c-bus = <&i2c3>;
word-address-1-byte-slave-addresses = <0x50 0x57>;
};
};

EEPROM with slave address 0x57(i2c3) is present on carrier board. Please let me know where the other two EEPROM are present(EEPROM with slave address 0x50 on i2c1 and EEPROM with slave address 0x50 on i2c3) are these present on SoM or carrier board?

Thanks,
Arun

3

hello arunkumar.d,

you may also check Jetson Module EEPROM Layout for reference,
please also look for SKU of the dumped values.
for example, according to Jetson part numbers, it’s 3448 for Nano SOM.

$ sudo i2cdump -f -y 2 0x50
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 01 00 fc 00 78 0d 00 00 04 46 00 00 00 00 00 00    ?.?.x?..?F......
10: 00 00 00 00 36 39 39 2d 31 33 34 34 38 2d 30 30    ....699-13448-00
20: 30 30 2d 34 30 30 20 46 2e 30 00 00 00 00 00 00    00-400 F.0......

the valued dump by 0x57 is 3449, which is carrier board.

$ sudo i2cdump -f -y 2 0x57
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 01 00 fc 00 79 0d 00 00 04 44 00 00 00 00 00 00    ?.?.y?..?D......
10: 00 00 00 00 36 39 39 2d 31 33 34 34 39 2d 30 30    ....699-13449-00
20: 30 30 2d 34 30 30 20 44 2e 30 00 00 00 00 00 00    00-400 D.0......

thanks

4

@JerryChang

Thanks for the clarification. Please let me know where is this EEPROM present.

5

you may also check Jetson Module EEPROM Layout for reference,

6

@JerryChang

I didn’t find required info here. I just want to know where this EEPROM with slave address 0x50 on I2C bus 0 present. Is it on SoM module or carrier board?

Thanks,
Arun

7

0x50 is on SoM module

8

@JerryChang
Thanks for the clarification.

so two EEPROM’s with slave address 0x50(one on I2c bus 0 and another on I2C bus 2) on SoM and one EEPROM with slave address 0x57 on carrier board.

Thank you

9

that’s correct, you may also refer to SKU of the dumped values.

1 Like