Emerson 752I Manuel D’Utilisation

752i User’s Manual

The Katana

752i baseboard incorporates a Linear Technologies LTC1643L Hot Swap

™

 con-

troller device and is fully compliant with the CompactPCI (cPCI) Hot Swap Specification (see 
references in 

752i circuit boards allow for High Availability Hot Swap sys-

tems, including cPCI/PSB systems (without a cPCI interface). Some basic Hot Swap features 
include:

• Ejector switch indication and Hot Swap LED control

• Back-end voltage isolation using the BD_SEL* signal and power supply health indication 

using the CPCI_HEALTHY* signal

• Minimal capacitive loading on power supplies and I/O pins, according to the Hot Swap 

Specification

• In-rush current limiting

The Katana

752i utilizes a programmable logic device, called the Hot Swap Logic (HSL) 

PLD to store various registers that provide status and affect the operation of the board. 
These registers are listed below.

Table 12-1:

F821,0000

J4SGA

Shelf Enumeration Bus pin status from J4 conn. (read only)

F821,0001

J4GA

Geographical Address from J4 connector (read only)

F821,0002

J2GA

Geographical Address from J2 connector (read only)

F821,0003

CT Clk Control

CT clock control registers (see page 13-3)

F821,0004

cPCI Status

Bit 0, CT_EN signal: 0 = present, 1 = not present
Bit 1, cPCI present on backplane: 1 = yes, 0 = no
Bit 2, HSL_CPCI_N signal: 0 = cPCI, 1 = no cPCI
(remaining bits are zero, only used when cPCI is enabled)

F821,0005

–

reserved

F821,0006

HS LED

Bit 0, Hot Swap LED control: 1 = LED on; 0 = LED off
(only used when cPCI is disabled)

F821,0007

–

reserved for HSL PLD version