Motorola PPC/CPCI-690, Reference Manual

Page: 136 / 176

PCI Bus 0 Buses
5 - 8 PPC/CPCI-690
PCI Bus 0
PCI bus 0 is running at 32-bit and 33 MHz.
SENTINEL
Motorola SENTINEL is used as PCI-to-CompactPCI universal bridge that
enables the board to work as either CompactPCI system (host) or periph-
eral board. SENTINEL is capable to run in either 3.3V or 5V VIO environ-
ment. For further information, refer to “Installation in a Powered System
Supporting Hot Swap” page 2-18.
The table below lists all fields in the SPROM of the SENTINEL, the contents
loaded into the registers at power up.
Note: Invalid SPROM contents may cause malfunction of the board.
Table 16: Devices on PCI Bus 0
PCI Device Device Type ID SEL Dev. No. PCI IRQ REQ/GNT
Discovery PCI Inter-
face 0 GT-64260A 31 21 INTA# Internal
PCI-to-CompactPCI
bridge SENTINEL 30 20 INTA# ..
INTD# 4
Table 17: PCI Bus 0 Interrupt Routing
PCI Device Device Interrupt Interrupt Received by
System Controller
Discovery PCI Interface 0 INTA# INTD#
PCI-to-CPCI Bridge SENTINEL INTA# INTC#
INTB# INTD#
INTC# INTA#
INTD# INTB#