Artesyn SAM1411 Installation and Use (September 2014) - Manual (Page 34)

Shelf Manager Hardware
SAM1411 Installation and Use (6806800M91B) 34
2.2.4 Console Interface
The SAM1411 provides one EIA-232 serial interface to the backplane, which is routed to the
Alarm Display Panel (ADP) in the AXP1411 shelf. This interface can be used for configuration
and diagnostic purposes. This interface is normally the console of the Payload Processor, but
under software control, can provide access to the ShMC console.
2.3 Shelf Management Controller
The ShMC part is derived from Artesyn Embedded Technologies's IPMC building block and
consists of two coupled microcontrollers:
 IPMC Master Controller (IMC), based on ATmega2560
 IPMC Slave Controller (ISC), based on ATmega168
2.3.1 IPMB0 Interface
IPMB0-A is connected to the I
2
C controller of the IMC and IPMB0-B is connected to the I
2
C
controller of the ISC of the ShMC. Both microcontrollers have their own I
2
C controller and
handle message transmission and reception independently, including bus error handling and
bus arbitration.
Received messages sent from both the IMC and the ISC channels are collected by the IMC. The
IMC dispatches messages, which have to be sent, either to its own I
2 C interface or to the ISC for
transmission.
2.3.2 IPMC Standard Functions
The standard functionality of the Artesyn Embedded Technologies IPMC is available on the
IPMC of the SAM1411. For more information, refer SAM1411 Control via IPMI Programmer’s
Reference Guide.