I/O register detail

Data register in Table is used for input and output of data in target mode. The register is not used in master mode.

 
Table: Data register  

LED register in Table is used for displaying data into the LED in P-PCI-LV interface.

 
Table: LED register  

SW register is used for identifying the interface. The register is useful to identify the interface instead of using minor number of Linux device file. The minor number changes according to the position of the interface in PCI slot of PC.

 
Table: Switch register  

The memory address register is used in master mode. The physical address of data buffer should be put.

 
Table: Memory address register  

The Length register is also used in master mode. The byte count of data to be transferred should be put.

 
Table: Length register  

The Mode register is a control register to P-PCI-LV interface.

 
Table: Mode register  

The Status register is a read-only status register.

 
Table: Status register  

RetLength register is used in master mode. The register includes the actual byte count which data have been transferred. The register should be read after read operation and then return the count as the return value of the operation.

 
Table: RetLength register  

FIFOLength register includes the actual size of data in FIFO. The register is used for checking the size of FIFO in long word or double word.

 
Table: FIFOLength register