User`s guide

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.