CS8920 datasheet(51/66 Pages) CIRRUS

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AN84REV1

CS8920 Technical Reference Manual

0x01

; Decode 16-bit ISA addresses

0x00

; Bits 7:0 of IO base min address

0x02

; Bits 15:8 OF IO base min address

0x60

; Bits 7:0 of IO base max address

0x03

; Bits 15:8 OF IO base max address

0x10

; 16 ports needed

0x10

; IO base paragraph aligned

;-------------------------------------------------------------

; Memory Descriptor 0, 16K Boot ROM

;-------------------------------------------------------------

0x81

; Large Item, Memory Descriptor 0

0x09

; Descriptor length = 9 bytes

0x00

0x40

; 8-bit ROM, non-shadowable, non-cacheable

0x80

0x0C

; Min Base Address = 0xC8000

0x00

0x0F

; Max Base Address = 0xF0000

0x00

0x20

; Base Alignment

0x40

0x00

; Range Length

;-------------------------------------------------------------

; Memory Descriptor 1 - 4K Shared Memory (RAM)

;-------------------------------------------------------------

0x81

; Large Item, Memory Descriptor 1

0x09

; Descriptor length = 9 bytes

Figure 3.4.1. Example PnP Resource Data Record (part 3 of 4)

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