CDA CD 60 Especificaciones descargar pdf (Pagina 82)

PCI CD and PCI CDa

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

Template: edt.dot

Page 82

The programming has failed if it has not completed after 32 clock cycles.

PCI Interrupt Status Register

Size 32-bit

I/O read-only

Address 0xC8

Access EDT_DMA_STATUS

Comments The driver uses this register initially to determine the source of a PCI

interrupt.

Bit EDT_ Description

D16–31 Not used.

D15 PCI_INTR PCI interrupt. When asserted, the PCI CD is asserting an

interrupt on the PCI bus.

D14 Not used.

D13 RMT_INTR Remote Xilinx interrupt. When asserted, the remote Xilinx

interrupt is set. If bits 14 and 15 of the the PCI interrupt and

remote Xilinx configuration register are aserted, the remote

Xilinx causes a PCI interrupt.

D12 DMA_INTR End of DMA interrupt. Asserted when at least one of the

DMA interrupts is asserted in the scatter-gather DMA next

count and control register. Causes a PCI interrupt if bit 15

of the PCI interrupt and remote Xilinx configuration register

is enabled.

D11–0 Not used.

Remote Xilinx Registers

The Xilinx chip is a programmable integrated circuit used to implement the PCI CD interface or to test

the board. The Xilinx programmable IC is programmed serially, using the PCI interrupt and remote

Xilinx configuration register as described on page 81.

Note

The following registers are defined to control the interface and reside in the remote Xilinx IC.

In order to access those registers, the PCI CD requires that the remote Xilinx be loaded with a

program that defines them. If the Xilinx is not loaded, or loaded with a different program, these

registers are inaccessible.

The Xilinx IC is programmed when the PCI CD driver is loaded, or by the application program.

If you have received a customized application program for your PCI CD from Engineering

Design Team,some or all of these registers may not be defined. Consult the documentation

that came with your customized program instead.

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CDA CD 60 Especificaciones Pagina 82