CS49325 datasheet(63/86 Pages) CIRRUS

63 / 86 page

CS49300 Family DSP

DS339PP4

require external SRAM. Please refer to the

CS4932X/CS49330 Part Matrix vs. Code Matrix

for more detail about each particular application

code.

The speed of external ROM or Flash Memory need

only be 330nS (or faster) which stores the

application codes, while the speed of the SRAM

must be 70nS or faster.

8.7. External Memory Examples

8.7.1. Non-Paged Autoboot Memory

The most rudimentary memory design discussed

above is the non-paged memory. In a non-paged

design, the DSP can only access one item in

memory which could be either a single full

download code load. The memory image given in

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

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

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