User`s guide

Introduction • 9
1.3.9 Baseboard Management
The Zircon CP baseboard management controller is used to manage all
aspects of the system board. The features are summarized as follows.
• ARM7/TDMI controller with internal 14KB SRAM
• IPMB interface
• External 16-bit flash ROM interface with ROM size 2Mb to 8Mb
• Six channels A-to-D converter for voltage monitoring, 10-bit resolution
• Provide a heartbeat timer
• Support CPU internal instruction error input (IERR#)
• Support CPU floating point error input (FERR#)
QLogic provides a firmware suite supporting the Intelligent Platform
Management Interface (IPMI) specification, including the Intelligent Platform
Management Bus (IPMB). See appendix A for an in-depth programmers
guide.
1.3.10 Power Ramp Circuitry
The cPCI-6810/6820 features a power controller with power ramp circuitry to
allow the board's voltages to be ramped in a controlled fashion. The power
ramp circuitry eliminates any large voltage or current spikes caused by hot
swapping boards. This controlled ramping is a requirement of the
CompactPCI Hot Swap specification, PICMG 2.1, Version 1.0. The
cPCI-6810/6810 's power controller unconditionally resets the board when it
detects that the 3.3V, 5V, and 12V supplies are below an acceptable operating
limit. These limits are defined as 4.75V (5V supply), 3.0V (3.3V supply), and
10.0V (+12V supply).