參數(shù)資料
型號(hào): PLI9080
廠商: Electronic Theatre Controls, Inc.
英文描述: PCI I/O ACCELERATOR
中文描述: 的PCI I / O加速器
文件頁數(shù): 68/133頁
文件大小: 883K
代理商: PLI9080
SECTION 4
PCI 9080
REGISTERS
PLX Technology, Inc., 1997
Page 60
Version 0.93
4.4.5 (EROMRR; PCI:10h, LOC:90h) Expansion ROM Range Register
Table 4-37. (EROMRR; PCI:10h, LOC:90h) Expansion ROM Range Register
Field
Description
Read
Write
Value after Reset
10:0
Reserved.
Yes
No
0
31:11
Specifies which PCI address bits to use for decoding a PCI to local bus expansion
ROM. Each of the bits corresponds to a PCI address bit. Bit 31 corresponds to
Address bit 31. A value of 1 should be written to all bits that should be included in
decode and a 0 to all others (used in conjunction with PCI Configuration register 30h).
Default is 64 KB.
Yes
Yes
FFFF00h
4.4.6 (EROMBA; PCI:14h, LOC:94h) Expansion ROM Local Base Address (Remap) Register
and BREQo Control
Table 4-38. (EROMBA; PCI:14h, LOC:94h) Expansion ROM Local Base Address (Remap) Register and BREQo
Control
Field
Description
Read
Write
Value after Reset
3:0
Direct Slave BREQo (Backoff Request Out) Delay Clocks. Number of local bus clocks
in which a Direct Slave HOLD request is pending and a Local Direct Master access is
in progress and not being granted the bus (LHOLDA) before asserting BREQo. Once
asserted, BREQo remains asserted until the PCI 9080 receives LHOLDA (LSB = 8 or
64 clocks).
Yes
Yes
0
4
Local Bus BREQo Enable. A value of 1 enables the PCI 9080 to assert the
BREQo output.
Yes
Yes
0
5
BREQo Timer resolution. A value of 1 changes the LSB of the BREQo timer from 8 to
64 clocks.
Yes
Yes
0
10:6
Reserved.
Yes
No
0
31:11
Remap of PCI Expansion ROM space into a Local Address Space. The bits in
this register remap (replace) the PCI address bits used in decode as the local
address bits.
Yes
Yes
0
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