SBE HighWire HW400c/2 User Manual

 

HighWire HW400c/2 User Reference Guide Rev 1.0 

ble 22) is connected to the CPLD and OR’ed with the /P_RST 

set signal from the Host CompactPCI bus.  A standard IPMI command is issued to 

initiate the board reset. IPMI commands are issued through an IPMI Shelf Manager 

 IPMI 

 

Zircon PM, together with all its supporting devices, draws about 

0mA maximum continuous current.  However, due to power-up inrush or a short 

cuit, the current could exceed 100mA.  Therefore, a current-limiting switch is 

here are two Atmel AT24C512 (64 KB) EEPROMs connected to I

2

C Port 2 on the 

Zircon PM.  The E

he runtime firmware.  The 

EEPROM at U87 i

 of information related to Field 

Replaceable Units (FRU), such as serial number.  These assignments are shown in 
Table 25. 
 
The EEPROMs can be pre-programmed (default), or th

grammed on-

MV

Serial Interface (TWSI), See Table 7.  

 

The IPMI EEPROMs pre-programmed at the factory should always be used. 
Programming on board is usually unnecessary, and is recommended only for expert 
users, as misconfiguration could result in unpredictable behavior.     
 
 
 

When programming the EEPROMs on-board, the Zircon PM must be held in the reset state by installing 
the IRST jumper on the J7 header (see Table 8).  Table 25

shows the I

2

C addresses of each EEPROM. 

 
 

 

The IPMI controller has the capability to issue a board reset.  A GPIO port on the 
Zircon PM (see Ta
re

 

The Vsm supply pin on the CompactPCI J1 connector delivers 5V to the
circuit.  The PICMG 2.9 specification sets the maximum current drawn from the Vsm
pin at 100mA.  The 
6
cir
connected at the Vsm pin. 
 

T

EPROM at U90 is for storage of t
s for boot code, as well as storage

ey can be pro

board via the 
 

64462 Two-Wire 

 

! 

 

 

Boot/FRU (U87) 

AT24C512 

0 

Runtime (U90) 

AT24C512 

1 

 
 

October 10, 2006 

Copyright 2006, SBE, Inc. 

Page 

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