參數(shù)資料
型號(hào)： UCB1500
廠商： NXP SEMICONDUCTORS
元件分類： 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)： 36/58頁(yè)
文件大?。?/td> 1001K
代理商： UCB1500
Philips Semiconductors
UCB1500
PCI to AC97 bridge/host controller
Objective specification
Rev. 01 — 4 February 2000
36 of 58
9397 750 06854
Philips Electronics N.V. 2000. All rights reserved.
8.6.9
[00c8]: AC97 command/GPIO control and status register
Table 54: AC97 command/GPIO control and status register bit description
Bit
Description
15-14
Command ID
Specifies 1 of 4 codec IDs for the AC-LINK register access commands.
00 = Codec0
01 = Codec1
10 = Codec2
11 = Codec3
Reserved.
Valid index data
Reads to this register will return a “1” if there is valid index data from the codec
connected to AC97 channel #0 in register CCh, bits[6-0]. Writing a “1” to this bit
will clear the status.
Reserved.
Valid status data
Reads to this register will return a “1” if there is valid read data from the codec
connected to AC97 channel #0 in register CAh. Writing a “1” to this bit will clear
the status.
AC97 command enable
Writing a 1 to this bit issues a command to the AC97 codec as specified in
bits[7-0] of this register on the next AC97 slot 1. Data for the write command is
specified in register CAh. On reads, this register will return “1” while write cycle is
in progress.
AC97 command
1 = read; 0 = write. This bit is output during AC97 slot 1 bit 19.
Reserved.
Command register index
Register index to use when generating register read/write command to AC97
codec. This data is output during AC97 slot 1, bits[18-12].
13
12
11
10
9
8
7
6-0
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