CS49310 datasheet(65/90 Pages) CIRRUS

65 / 90 page

CS49300 Family DSP

DS339F7

Figure 40 is an example of a non-paged memory

image.

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.

ROM Content

Image Size

Number of Pages

Required

IBA Code(s)

Stored in Host

Type of Design

CS493254

N/A, All IBA codes are loaded

using Host Boot technique

N/A, All IBA codes

are loaded using

Host Boot technique

N/A, All IBA codes

are loaded using

Host Boot technique

Dolby Digital with

PL II,

C.O.S.

Dolby Digital with

Pro Logic II 5.1

Channel System

Dolby Digital with PLII +

Cinema Re-EQ,

HDCD

32 + 32 = 64 Kbytes

C.O.S.

Enhanced

Dolby Digital with

Pro Logic II 5.1

Channel System

CS493264

N/A, All IBA codes are loaded

using Host Boot technique

N/A, All IBA codes

are loaded using

Host Boot technique

N/A, All IBA codes

are loaded using

Host Boot technique

Dolby Digital with

PL II,

C.O.S., DTS

Enhanced

Dolby Digital/

DTS 5.1 Channel

System

Dolby Digital with C.E.S., MPEG

Multichannel with C.E.S., DTS

with C.E.S., MP3

32 * 4 pages =

128 Kbytes

C.O.S.

Basic 6.1

Channel System

Dolby Digital with PLII with

C.E.S., MPEG Multichannel with

PLII, DTS-ES, DTS Neo:6

32 * 4 pages =

128 Kbytes

C.O.S.

Enhanced 6.1

Channel System

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

32 * 8 =

256 Kbytes

C.O.S.

Premium

6.1/7.1 Channel

System

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 * 8 =

256 Kbytes

N/A, No IBA

Codes not avail-

able for the

CS493292

Premium 6.1/7.1

Channel System

with AAC

Support

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

Figure 40. Non-Paged Memory

0x00000

0x0FFFF

Dolby Digital with

Pro Logic II Code

another Full Download Code

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