Owner manual

aTCA-RN720 User's Guide
36
7.2 Features and Functions
Itemized below are the features and the functions of the MMC.
• RTM Management
9 Intelligent RTM depends on the MMC.
9 MMC communicates with the front blade IPMC via IPMB-L through a Hot-swap buffer
: FRU information and Commands are exchanged.
• Programmable device(CPLD) Download Interface
9 The CPLD programming interface is connected to the MMC GPIO. Upon request
from the IPMC, the MMC initiates the programming of the CPLD image downloaded
to the RTM via IPMB-L interface.
• Power Sequence
9 The MMC controls all the power rail enable/disable signals, which is essential to the
power sequencing. The power sequencing therefore is controlled by the MMC.
• Power monitoring
9 All the power rail monitoring is done. Any violation of the threshold vales triggers an
event and the MMC reports to the IPMC and shuts down the power to protect the
board.
• FRU Information
9 The MMC provides a Master only I2C Interface which is connected to an EEPROM
that contains RTM information, the log, and the alarms.
• Sensor
9 The on board sensors are connected to a Master only I2C Interface of the MMC and
provide the collected information such as voltage and thermal values to the MMC per
the MMC’s request.
7.3 MMC Control Operation
Some of the major chassis management operations are described in Table 7-1 and detailed
explanations follow.
Table 7-1 Board Shutdown and Reset Procedures (Front Blade + RTM)
No Item Description
1 Cold Reset Cold reset Command from Shelf manager
2 Front Blade Deactivate Front Blade Deactivate Command from Shelf
manager
3 Front Blade Activate Front Blade activate Command from Shelf
manager
4 RTM Deactivate RTM Deactivate Command from Shelf manager
5 RTM Activate RTM activate Command from Shelf manager
6 Front blade shutdown Front Blade Shutdown Command from LMP
7 RTM shutdown RTM Shutdown Command from LMP
8 Front Hot swap Open the Hot-swap switch of Front blade
9 RTM Hot swap Open the Hot-swap switch of RTM