NEC Network Controller uPD98502 - Manual (Page 370)

370 Preliminary User’s Manual S15543EJ1V0UM
CHAPTER 7 PCI CONTROLLER
7.1 Overview
The PCI Controller supports both NIC mode and Host mode. With the NIC mode, the PCI Controller does not issue
configuration cycle and the arbitration function is not enabled. With the Host mode, the PCI Controller can issue
configuration cycle and the arbitration function is enabled. Futures of the PCI Controller are as follows.
• 32-bit PCI Interface
• 33-MHz PCI frequency capable
• Compliant to PCI Local Bus Specification Rev.2.2
• Compliant to PCI bus Power Management Interface Rev.1.1
• Supports up to 16-word burst access
• Supports posted write function
• Supports Delayed/Non Delayed read/write cycle
• Implements PCI bus arbiter that supports up to 4 external PCI-master devices at Host-mode
Figure 7-1. The PCI Controller Block Diagram
P C I S lave
IB U S M aster
P C I
M aster
IB U S S lave
R egisters F IF O F IF O F IF O F IF O
P 2I
C ontrol
I2P
C ontrol
D ata F low
C ontrol
P C I
A rbiter
Idle
C ontrol