CDA CD 60 Spécifications télécharger pdf (Page 88)

PCI CD and PCI CDa

Document Number: 008-00965-06 EDT Public December 2004

Template: edt.dot

Page 88

Programmed I/O Low Register

Size 8-bit

I/O read-write

Address 0x08

Access PCD_PIO_OUTLO

Bit PCD_ Description

7–0 Outputs data on the low 8 bits of the 16-bit word.

Programmed I/O High Register

Size 8-bit

I/O read-write

Address 0x09

Access PCD_PIO_OUTHI

Bit PCD_ Description

7–0 Outputs data on the high 8 bits of the 16-bit word.

Interface Configuration Register

Size 8-bit

I/O read-write

Address 0x0F

Access PCD_CONFIG

Bit PCD_ Description

0 BYTESWAP A value of 1 swaps the order of bytes in a 16-bit word of

data coming in from the data source.

1 SELRXT A value of 1 selects RXT as source for TXT.

2 SETAV64 Debug only. A value of 1 tells PCI Xilinx there is always

data available.

3 SHORTSWAP Set to 1 if the host computer writes the first 16-bit word on

bits 16-31 of the PCI data bus (big-endian format) instead

of bits 0-15 as defined in the PCI bus specification.

4 DED Disable delay on start of outputting. If set, may cause

1 2 ... 83 84 85 86 87 88 89 90 91

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CDA CD 60 Spécifications Page 88