Motorola ATCA-717 - Manual (Page 119)

Intelligent Platform Management Controller Devices’ Features and Data Paths
PENT/ATCA−717 119
Intelligent Platform Management Controller
The blade provides an Intelligent Platform Management Controller (IPMC) unit based an
the 8−bit Atmel ATmega AVR microcontrollers. The IPMC is fully compliant to the IPMI
V1.5 standard and provides the following interfaces:
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S IPMB0A and IPMB0B available via the backplane
S IPMB−L connected to rear transition module
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S I2C interfaces connected to on−board PMCs slots and sensors
S Analog−to−Digital Conversion (ADC)interfaces connected to on−board sensors
S Digital I/O interfaces connected to on−board sensors
One of the main tasks of the IPMC is to control the power up and power down of the
blade. For this purpose the IPMC is connected to the on−board power supply module via
control and status lines. Various on−board IPMI sensors provide detailed information on
the current power status of the blade to any interested party connected to the IPMI
network.
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The following figure gives an overview of the IPMI structure used on−board. aaa
Backplane
RTM
Host FPGA
Atmega 64L
Atmega 8L
Atmega 8L
IPMB0A
IPMB0B
Power Supply
Module
IPMB−L
Atmega 32L
IPMB−L
PMC 1
PMC 2
PMC 3
PMC 4
I2C MUX
I2C
I2C
IDROM
SPI
IPMC
Sensors
Dig. I/O
ADC
ADC
ADC
Blade
Control and
Status Signals
Figure 36: IPMI Structure
For details about accessing the IPMC via IPMI commands as well as Sensor Data Records
(SDRs) and Field Replacable Unit (FRU) information provided by the blade, refer to the
"PENT/ATCA−715/717/7105/7107 Control via IPMI Programmer’s Guide" which can be
downloaded from the Motorola literature catalog.
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