SMART Embedded Computing MC1600, Installation And Use Manual

Page: 79 / 126

System Overview
MC1600 Extreme Edge Server Installation and Use (6806870A02B) 79
 Enable all on-board DC-DC converter for CPU complexes
 Implementation of power-up timing sequence requirements
 Supervision of power rails for CPU complex
 I
2
C slave interface connected the BMC
– Power control of both CPUs
– Power fail registers for both CPUs
– Control and status registers for each CPU
– Error status registers for each CPU
 LPC target interface for each CPU
– Port 0x80 for each CPU, select CPU via SMBus register
– SERIRQ for KCS interrupt support
– Control and status registers
– Can be used to update configuration of the logic device
1.13.2 Glue CPLD
The Glue CPLD on the Extreme Edge Server runs off management power and is
associated with the BMC and is powered anytime -48V power is present. It implements
these major functions:
 Monitor output of low-temperature thermal switch
 Enable BMC power under appropriate operating conditions
 Implement power-up timing sequence requirements for non-CPU power rails
 Supervision of non-CPU power rails
 Enable on-board clocks when payload power is stable
 I
2
C slave interface connected the BMC
 Update configuration of the logic device via I
2
C interface
 Reset control
 BMC serial routing, routes 1 UART from each CPU to BMC
 Control debug LEDs via registers
 Watchdog timer
 LPC slave interface connected to CPU1
 Implement status and control registers for SFP+ modules