CS98100 查看數據表（PDF） - Cirrus Logic

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CS98100

DVD Processor for Low Cost DVD Players

Cirrus Logic 

CS98100

4. MEMORY MAP AND REGISTERS

4.1 Processor Memory Map

The CS98100 externally supports up to 32 Mbytes DRAM and 16 Mbytes ROM/NVRAM. Table 9 lists

the memory map as viewed by the RISC processor, and identifies whether each segment is mapped or

cacheable.

Processor byte address

Description

0000_0000 – 07FF_FFFF

DRAM (mapped)

8000_0000 - 81FF_FFFF

DRAM (32 Mbytes)

9400_0000 – 9CFF_FFFF

16 bit NVRAM write (16 Mbytes)

9C00_0000 – 9CFF_FFFF

16 bit NVRAM/ROM (16 Mbytes)

9D00_0000 – 9DFF_FFFF

8 bit NVRAM/ROM (16 Mbytes)

A000_0000 – A1FF_FFFF

DRAM (32 Mbytes)

B000_0000 – B003_FFFF

Internal I/O (256 Kbytes)

B400_0000 – BCFF_FFFF

16 bit NVRAM write (16 Mbytes)

BC00_0000 – BCFF_FFFF

16 bit NVRAM/ROM (16 Mbytes)

BD00_0000 – BDFF_FFFF

8 bit NVRAM/ROM (16 Mbytes)

C000_0000 – FFFF_FFFF

DRAM (mapped)

Table 9. Memory Map - RISC Processor

4.2 Host Port Memory Map

Table 10 lists the memory map as viewed by host slave port.

Cacheable

Y

Y

N

Y

Y

N

N

N

N

N

Y

Host byte address

Description

0000 0000 – 003F FFFF

Internal I/O Space

1000 0000 – 13FF FFFF

DRAM space (16 Mbytes)

1400 0000 – 17FF FFFF

NVRAM space (16 Mbytes)

Table 10. Host Port Memory Map

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