CDB42528 Cirrus Logic Inc, CDB42528 Datasheet - Page 52

• Manufacturer Part Number: CDB42528
• Description: BOARD EVAL FOR CS42528/CS49300
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42528

• Main Purpose: Audio, Audio Processing
• Embedded: Yes, DSP
• Utilized Ic / Part: CS49300, CS42528
• Primary Attributes: 8 Single-Ended Analog Inputs and Outputs, 4 S/PDIF Inputs and 2 S/PDIF Outputs
• Secondary Attributes: Parallel, RS422, RS232, UDSP Interfaces
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1503

physically
limitations of a non-paged memory are easily seen,
and they can be circumvented using paged
memory designs as discussed in the next section.
7.2. Paged Memory
Sometimes it is desirable for the external memory
to be paged by the host controller. One application
where this is useful is the autoboot mechanism
(discussed in
Using paged memory allows multiple dsp firmware
applications to be stored in the same memory, with
52
reside
Section 8.2, “Autoboot” on page
at
location
0x0000.
The
57).
one application code image residing in each 32
kilobyte page.
Paging of the external memory is handled entirely
by the host controller. The host controller should
directly control all address bits outside of the
memory space to be used by the DSP. As 32
kilobyte pages are desired to hold each application
code, the DSP would need 15 bits for the address
space. The system designer would connect the 15
address signals from the address latches while the
host would directly control all address signals
above 15 bits to page the memory accordingly.
CS49300 Family DSP
DS339F7