11990-190/192
ATCA Backplane
12
R1.0, October 2018
3.3 Chassis Data Modules (CDM)
The Chassis Data Module (CDM) is a carrier board for the FRU SEEPROM
(24LC256)
Figure 6: Chassis Data Module 1 (CDM 1)
1
Both CDMs are pluggable modules and located on the rear side of the ATCA
Backplane. The modules can be accessed after removing the respective Power
Entry Module (PEM).
Table 2: Chassis Data Module I²C addresses
12712816
1
CDM 1
2
Connector PEM A
Warning!
Before removing a PEM, make sure that all Power Feeds of the other PEM are
fully functional.
CDM
Channel
I²C-bus address
CDM 1, SEEPROM
Channel 1
0xa4 / 52
CDM 2, SEEPROM
Channel 2
0xa4 / 52
