TMS320DM647 datasheet(136/166 Pages) TI

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6.16.3 PCI Electrical Data/Timing

6.17 Multichannel Audio Serial Port (McASP) Peripheral

6.17.1 McASP Device-Specific Information

TMS320DM647/TMS320DM648

Digital Media Processor

SPRS372 – MAY 2007

Table 6-58. PCI External Memory Space (continued)

HEX ADDRESS OFFSET

ACRONYM

0x4780 0000 - 0x47FF FFFF

PCI Master Window 15

0x4800 0000 - 0x487F FFFF

PCI Master Window 16

0x4880 0000 - 0x48FF FFFF

PCI Master Window 17

0x4900 0000 - 0x497F FFFF

PCI Master Window 18

0x4980 0000 - 0x49FF FFFF

PCI Master Window 19

0x4A00 0000 - 0x4A7F FFFF

PCI Master Window 20

0x4A80 0000 - 0x4AFF FFFF

PCI Master Window 21

0x4B00 0000 - 0x4B7F FFFF

PCI Master Window 22

0x4B80 0000 - 0x4BFF FFFF

PCI Master Window 23

0x4C00 0000 - 0x4C7F FFFF

PCI Master Window 24

0x4C80 0000 - 0x4CFF FFFF

PCI Master Window 25

0x4D00 0000 - 0x4D7F FFFF

PCI Master Window 26

0x4D80 0000 - 0x4DFF FFFF

PCI Master Window 27

0x4E00 0000 - 0x4E7F FFFF

PCI Master Window 28

0x4E80 0000 - 0x4EFF FFFF

PCI Master Window 29

0x4F00 0000 - 0x4F7F FFFF

PCI Master Window 30

0x4F80 0000 - 0x4FFF FFFF

PCI Master Window 31

Texas Instruments (TI) has performed the simulation and system characterization to be sure that the PCI

peripheral meets all ac timing specifications as required by the PCI Local Bus Specification (version 2.3).

The ac timing specifications are not reproduced here. For more information on the ac timing specifications,

see Section 4.2.3, Timing Specification (33 MHz timing), and Section 7.6.4, Timing Specification (66 MHz

timing), of the PCI Local Bus Specification (version 2.3). Note that the DM647/DM648 PCI peripheral only

supports 3.3-V signaling.

The McASP functions as a general-purpose audio serial port optimized for the needs of multichannel

audio applications. The McASP is useful for time-division multiplexed (TDM) stream, Inter-Integrated

Sound (I2S) protocols, and intercomponent digital audio interface transmission (DIT).

The DM647/DM648 devices include one multichannel audio serial port (McASP) interface peripheral

(McASP). The McASP is a serial port optimized for the needs of multichannel audio applications.

The McASP consists of a transmit and receive section. These sections can operate completely

independently with different data formats, separate master clocks, bit clocks, and frame syncs or

alternatively, the transmit and receive sections may be synchronized. The McASP module also includes a

pool of 16 shift registers that may be configured to operate as either transmit data or receive data.

The transmit section of the McASP can transmit data in either a time-division-multiplexed (TDM)

synchronous serial format or in a digital audio interface (DIT) format where the bit stream is encoded for

S/PDIF, AES-3, IEC-60958, CP-430 transmission. The receive section of the McASP supports the TDM

synchronous serial format.

The McASP can support one transmit data format (either a TDM format or DIT format) and one receive

format at a time. All transmit shift registers use the same format and all receive shift registers use the

same format. However, the transmit and receive formats need not be the same.

Both the transmit and receive sections of the McASP also support burst mode which is useful for

non-audio data (for example, passing control information between two DSPs).

Peripheral Information and Electrical Specifications

136

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