VVDN_T4MFCS_Scaleout_User_Manual Rev. A0-03
32
CONFIDENTIAL
source - run script from memory
test - minimal test like /bin/sh
tftpboot- boot image via netw
usbboot - boot from USB device
I2C Interface
6.4
1.
Chip Probe
i2c dev 0
Setting bus to 0
i2c probe
Valid chip addresses:
i2c dev 1
Setting bus to 1
i2c probe
Valid chip addresses: 1A 1B 1C 32 33 34 52 53 54 68 70
i2c dev 2
Setting bus to 2
i2c probe
Valid chip addresses: 1B 24 33 53 60 62
70 – I2c multiplex
68 – RTC
60 & 62 – PCI retimer
24 – GPIO Expander
DDR3 SPD
6.5
1.
Chip Probe:
The DDR3 SPD address is 52h,53h,54h (8-bit), and it can be accessed at I2C#2.
2.
Read SPD
If we want to check the SPD information or DDR information we can use the
following command to check or read we will get the output as mentioned:
i2c md 52 0 100
0000: 92 13 0b 02 03 19 00 09 0b 11 01 08 09 00 fc 02
0010: 69 78 69 28 69 11 10 79 00 05 3c 3c 00 d8 83 01
0020: 80 00 ca 00 00 00 00 00 00 00 00 00 00 00 00 00
0030: 00 00 00 00 00 00 00 00 00 00 00 00 04 11 29 01
0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00