User`s guide

Registers Format

In this chapter, the register format of the analog output channel and

digital I/O ports are introduced. Before programming or applying the

6208 series cards to your applications, please go through this chapter to

understand the features of the functions.

The 6208 functions as a 32-bit PCI target device to any master on the

PCI bus. There are three types of registers: PCI Configuration Registers

(PCR), Local Configuration Registers (LCR) and 6208 registers.

The PCR, which compliant to the PCI-bus specifications, is

initialized and controlled by the plug & play (PnP) PCI BIOS.

User‘s can study the PCI BIOS specification to understand the

operation of the PCR. Please contact with PCISIG to acquire the

specifications of the PCI interface.

The LCR is specified by the PCI bus controller PLX-9050, which is

provided by PLX technology Inc. (www.plxtech.com) . It is not necessary

for users to understand the details of the LCR if you use the software

library. The base address of the LCR is assigned by the PCI PnP BIOS.

The assigned address is located at offset 14h of PCR.