Sun Microsystems Blade 1500 - PCI Bus Information

Appendix C Functional Description C-17
FIGURE C-5 JIO Block Diagram
C.4.3 PCI Bus Information
C.4.3.1 PCI-A Leaf
The PCI-A leaf on JIO is a 64-bit/66MHz or 64-bit/33MHz version 2.2 compliant
implementation. The interface has an internal arbiter that can support up to eight
masters resident on the bus.
The PCI-A leaf includes an interrupt block (Mondo Dispatch) that receives system
interrupts from the external IChip2 and the PCI interface unit itself. The interrupt
unit communicates with the JBus cluster to send out the interrupt onto the JBus.
C.4.3.2 PCI-B Leaf
The PCI-B interface is a 64-bit/66MHz PCI leaf with an internal arbiter that supports
two masters on the PCI bus.
JBus Interface
120-200MHz
128 bit data. 36 bit address
I/O Cache
8x64 byte
Scratch Pad
Registers
64 x 64
PCI-A-Leaf PCI-B-Leaf
RIC
Configuration
and Status
Registers
Interrupt Interface
(6 bits)
Primary PCI Bus
64 bit
66Mhz/33MHz
Secondary PCI
Bus 64 66MHz
MMU MMU
I/O Cache
8x64 byte
JBus Interface Unit
JBus Applications Unit
Primary PCI Interface Unit
Primary PCI Application Unit
Secondary PCI Application Unit
Secondary PCI Interface Unit