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PDF CMI8787 Data sheet ( Hoja de datos )
| Número de pieza | CMI8787 | |
| Descripción | High Performance PCI Audio Processor | |
| Fabricantes | C-Media Electronics | |
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OxygenTMHD CMI8787
High Performance
PCI Audio Processor
Data Sheet v0.5
2005/12/13
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C-Media High Performance PCI Audi o Processor
OxygenTM HD CMI8787 Datasheet v0.5
0. Revision History
Date
200 5/0 3/1 5
2005/12/13
Rev.
0.1
0.5
Release Note
Preliminary vision
Edit for readability
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C-Media High Performance PCI Audi o Processor
OxygenTM HD CMI8787 Datasheet v0.5
3.2 Pin Descriptions
The following table gives the pin descriptions for the OxygenTMHD CMI8787.
Some of the pins perform multiple functions, so for the sake of consistency, a pin may
be listed more than once in the table. The abbreviations used in the pin description table
are explained below.
DI: digital input signal
DO: digital output signal
DIO: digital bidirectional signal
AI: analog input
PU: pull- up with 75K resistor
PD: pull-down with 75K resistor
#: low active signal
Table 3.1 Pin description table of OxygenTMHD CMI8787
Symbol
XRST
XCLK33
XIDSEL
XGNT#
XREQ#
XAD[31:0]
XCB#[3:0]
XFRAME#
XDEVSEL#
XIRDY#
XTRDY#
Pin No. Type
Description
PCI Bus Interface
119 DI PCI Bus Reset.
120 DI PCI Bus clock, 33MHz.
5 DI PCI Initialization Device Select. This is the chip select during PCI
configuration access.
121 DI PCI Bus Grant. When active, PCI bus master is granted to
CMI8787.
122
1-3, 7-11,
13-15, 25, 27,
28-31, 33,
35-38, 40-44,
123-126, 128
DIO PCI Bus Master Request. When active, the CMI8787 is requesting
to become a bus master.
DIO PCI Address / Data Bus
4, 16, 24, 34 DIO PCI Bus Command / Byte Enable
17 DIO PCI Cycle Frame. It is driven by the current master to indicate the
beginning and duration of an access
21 DIO PCI Device Select. When active, indicates that the driving device
has decoded its address as the target of the current access.
18 DIO PCI Initiator Ready. When active, indicates that the initiator can
complete the current data phase of the transaction.
20 DIO PCI Target Ready. When active, indicates the target device can
complete the current data phase of the transaction.
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