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參數(shù)資料
型號(hào)： UCB1500
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 總線控制器
英文描述： PCI to AC97 bridge/host controller
中文描述： PCI BUS CONTROLLER, PQFP80
封裝： 12 X 12 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-315-1, LQFP-80
文件頁(yè)數(shù)： 26/58頁(yè)
文件大小： 1001K
代理商： UCB1500
Philips Semiconductors
UCB1500
PCI to AC97 bridge/host controller
Objective specification
Rev. 01 — 4 February 2000
26 of 58
9397 750 06854
Philips Electronics N.V. 2000. All rights reserved.
8.1.28
[0054]: Miscellaneous
8.1.29
[0055-56]: Reserved
8.1.30
[0057]: Miscellaneous
Table 34: Miscellaneous register bit description
Bit
Description
15-14
Reserved.
13
PCI read retry complete
If set, UCB1500 will always complete any read cycle that is being retried by the
PCI target even if DMA is aborted. The data returned is then discarded.
Recommended setting is 1.
12
Reserved.
11-10
PCI bus outstanding cycle limit
00 = allow 1 outstanding PCI master read cycle and 1 master write cycle.
01 = allow 2 outstanding PCI master read cycles and 1 master write cycle.
Other read cycles are allowed to proceed ahead of write cycles.
Other values are reserved
Software reset
While set, internal state machine and IO registers revert to power-up state (see
software rest section).
Reserved
9
8-0
Table 35: Miscellaneous register bit description
Bit
Description
15-9
Reserved.
8
Control register access
Control how I/O space can be accessed in different power states. Note that this
bit applies to each function separately.
If set to ‘1’, then for each of function, I/O register access is allowed if the
function is programmed to D0, D1 or D2 power state. If the function is
programmed to D3 power state, all I/O register access will be ignored, even if
its I/O space access bit is enabled in the PCI command register.
If set to ‘0’ (default), then for each function, I/O register access is allowed if
the function is programmed to D0 power state. If the function is programmed
to D1, D2 or D3 power state, all I/O register access will be ignored.
Function 1 Enable
If set to ‘1’, function 1 configuration space will be enabled, otherwise, EEPROM
will determine if it is enabled or not.
Reserved. Must be set to 1.
Function 1 status
If ‘1’, function 1 is enabled during reset.
EEPROM autoload
If ‘1’, EEPROM autoload is enabled during reset.
Reserved.
7
6
5(r)
4(r)
3-0
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