Emerson 752I Manuel D’Utilisation

752i User’s Manual

The Katana

752i utilizes the Peripheral Component Interconnect (PCI) bus as the interface 

between the 750GL processor complex, PCI Telecom Mezzanine Card (PTMC) sites, 
optional T8110 time slot interchanger (TSI), and 82544 Ethernet media access controller 
(MAC). The Katana

752i complies with the PCI bus interface standard and the associated 

PMC mechanical interface standard. The Marvell MV64460 device functions as the PCI 
bridge and always performs local PCI bus arbitration. 

The following devices are on the PCI bus:

• IBM 750GL processor complex (host controller by default)

• Two PCI expansion sites (Monarch or non-Monarch)

• Optional Ambassador T8110 TSI (PCI target only)

• Intel 82544 Ethernet MAC

Note:

By default, the 750GL processor complex functions as a Monarch. In this mode, the 
MV64460 serves as a PCI system controller. It provides PCI arbitration and PCI bus enumer-
ation. The Katana

752i also has configuration jumpers at JP2 (see 

) which can set 

either PTMC site as the Monarch. 

The PCI standard allows for environments where the number and types of devices on the 
PCI bus varies. Therefore, the Katana

752i does not support a fixed memory map. The PCI 

system controller dynamically defines the memory map using a process called enumera-
tion. In this process, the PCI system controller probes the PCI bus to discover what devices 
are installed and how much memory space each device is requesting. The system controller 
then allocates the available PCI memory, defines the base address of each device, and con-
figures the PCI base address registers for each device accordingly.

PCI device software should assign physical addresses dynamically, in the format of “base 
address + offset”. The enumeration routine can retrieve the base address. The offset is 
device-dependent and fixed. The monitor software performs enumeration routines at 
power-up and PCI reset. The operating system also performs enumeration upon booting. 
The monitor and operating system both have built-in hooks for retrieving the base 
addresses.

The Katana

752i follows the typical PCI convention for assigning ID Select signals, as 

shown in the following table.