Kontron AM4904, User Manual

Page: 28 / 135

Functional Description
10 AM4904 User Guide
www.kontron.com
• RTC input/output
• LED Bus receiver
• LED distribution
• Board Option Register / Strappings (8bit)
• Watchdog
• Reset Distribution
• Slot address/Site-ID decoding
2.2.7 I2C EEPROM
The I2C EEPROM holds PowerPC 405EX configuration data. The size of the I2C EEPROM is minimum 128bit (16
Byte EEPROM bootstrap configuration content. It has a write protection by FPGA and is programmable via
JTAG.
2.2.8 Real Time Clock (RTC)
The real time clock is used on the MCMC to keep accurate time. The clock has an integrated micro crystal
oscillator. The oscillator’s frequency is 32.768 KHz. The back-up capacity of the RTC is up to 2 weeks.
2.2.9 Serial Interface
The PowerPC 405EX is connected to the front plate of the board via a multichannel RS232 Line Transceiver.
The serial RS232 interface supports the TX# and RX# signals as well as the RTS, DTR, CTS and DSR signals and
operates with up to 115.2kB/s.
2.2.10 FE Management
The front panel provides a direct 10/100/1000 Base-T Ethernet connection (RJ45) to the PPC 405EX for out-
of-band management and debugging purposes.
2.2.11 Board Sensors
Sensors for voltage or temperature monitoring and various others for pass/fail type signal monitoring are
provided.
Every sensor is associated with a Sensor Data Record (SDR). Sensor Data Records contain information about
the sensors identification such as sensor type, sensor name, sensor unit. SDRs also contain the configura-
tion of a specific sensor such as thresholds, hysteresis, event generation capabilities, etc. that specify the
sensor’s behavior. Some fields of the sensor SDR are configurable through IPMI v1.5 command and are set to
a built-in initial value.
The sensor ID is the number which identifies the sensor e.g. when using the IPMI command “Get Sensor
Reading”. Please note that ‘ipmitool’ accepts sensor IDs in decimal (e.g. ‘10’) or hexadecimal (e.g. ‘0xa’)
notation.