CS493264 データシートの表示（PDF） - Cirrus Logic

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CS493264

Multi-Standard Audio Decoder Family

Cirrus Logic 

CS49300 Family DSP

ROM Content

CS493254

N/A, All IBA codes are loaded

using Host Boot technique

Dolby Digital with PLII +

Cinema Re-EQ,

HDCD

CS493264

N/A, All IBA codes are loaded

using Host Boot technique

Image Size

Number of Pages IBA Code(s)

Required

Stored in Host Type of Design

N/A, All IBA codes N/A, All IBA codes Dolby Digital with Dolby Digital with

are loaded using are loaded using

PL II,

Pro Logic II 5.1

Host Boot technique Host Boot technique

C.O.S.

Channel System

32 + 32 = 64 Kbytes

2

C.O.S.

Enhanced

Dolby Digital with

Pro Logic II 5.1

Channel System

N/A, All IBA codes N/A, All IBA codes Dolby Digital with Enhanced

are loaded using are loaded using

PL II,

Dolby Digital/

Host Boot technique Host Boot technique C.O.S., DTS DTS 5.1 Channel

System

Dolby Digital with C.E.S., MPEG

Multichannel with C.E.S., DTS

with C.E.S., MP3

Dolby Digital with PLII with

C.E.S., MPEG Multichannel with

PLII, DTS-ES, DTS Neo:6

Dolby Digital with PLII with

C.E.S., MPEG Multichannel with

PLII, DTS-ES with PLII, DTS

Neo:6, HDCD, LOGIC7, MP3,

Virtual Dolby Digital with VMAx

VirtualTheater

CS493292

Dolby Digital with PLII with

C.E.S., MPEG Multichannel with

PLII, DTS-ES, DTS Neo:6,

HDCD, SRS Circle Surround II,

C.O.S., MPEG-2: AAC

32 * 4 pages =

128 Kbytes

32 * 4 pages =

128 Kbytes

32 * 8 =

256 Kbytes

32 * 8 =

256 Kbytes

4

C.O.S.

Basic 6.1

Channel System

4

C.O.S.

Enhanced 6.1

Channel System

8

C.O.S.

Premium

6.1/7.1 Channel

System

8

N/A, No IBA Premium 6.1/7.1

Codes not avail- Channel System

able for the

with AAC

CS493292

Support

Table 12. Memory Requirements for Example 5.1, 6.1 and 7.1 Channel Systems

Figure 40 is an example of a non-paged memory

image.

0x00000

Dolby Digital with

Pro Logic II Code

or

0x0FFFF another Full Download Code

Figure 40. Non-Paged Memory

Only 15 of the 16 output bits of the address latches

would be connected to address bits A0-A14 of the

external ROM, in order to have access to the single

application code stored in the 32 kilobyte non-

paged memory. The host is completely isolated

from memory accesses in this situation. Once the

hardware has been designed, the DSP itself will be

responsible for all communication with the ROM.

8.7.2. 32 Kilobyte Paged Autoboot

Memory

An external memory architecture which is paged

on 32 Kilobyte boundaries offers the higher end

system the ability to store several full download or

IBA application codes in each 32 Kilobyte page.

Figure 41 shows an example of a 32 Kilobyte

paged memory image for a the premium 6.1/7.1

channel system describe in Table 12 above.

DS339F7

65

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