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Registers PCI CD/CDa Configurable DMA Interface User’s Guide

32 EDT, Inc. May 2007

Programmed I/O Low Register

Size 8-bit

I/O read-write

Address 0x08

Access PCD_PIO_OUTLOW

Programmed I/O High Register

Size 8-bit

I/O read-write

Address 0x09

Access PCD_PIO_OUTHI

Bit Description

7–0 Outputs data on the low eight bits of the 16-bit word. First write the low eight bits you wish to output to

this register, then write the high eight bits to Programmed I/O High Register.

Bit Description

7–0 Outputs data on the high eight bits of the 16-bit word. First write the low eight bits you wish to output

to the Programmed I/O Low Register, then write the high eight bits to this register. When the byte is

output, an ODV signal (Output Data Valid) is also output for one TXT clock cycle.

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CDA CD 60 Guida Utente Pagina 36