Measurement-computing CIO-PDMAxx Instrukcja Użytkownika Pobierz pdf (Strona 17)

5.2 CIO-PDMA32 REGISTER MAP

The PDMA-32 boards use 16 consecutive addresses starting at the Base Address in

the computers I/O space, as shown in the following table. The shaded areas highlight

the address space that the MetraByte PDMA-32 board uses. Note that MetraByte does

not use Addresses B to F hex.

Read/writeFIFOBase Address + E : F

WriteArmBase Address + D

Read/WriteREP ControlBase Address + C

WriteFIFO ClearBase Address + B

ReadInterrupt StatusBase Address + A

Read/writeInterrupt LevelBase Address + 9

Read/writeDMA LevelBase Address + 8

ReadCounter Status

WriteCounter ControlBase Address + 7

Read/writeCounter 2Base Address + 6

Read/writeCounter 1Base Address + 5

Read/writeCounter 0Base Address + 4

Read/writeInterrupt ControlBase Address + 3

Read/writeDMA ControlBase Address + 2

Read/writeB PortBase Address + 1

Read/writeA PortBase Address + 0

TYPEFUNCTIONADDRESS

5.2.1 PORTS A & B Base Address + 0 and Base Address + 1

These ports are the main digital I/O ports. Each port is 8-bits wide and can be used

individually or combined into one 16-bit port for programmed I/O, DMA I/O, or

rep-string I/O. Each port is associated with a data direction output (ADIR, BDIR).

Bits D0 and D1 of the DMA Control register select the data directions. On power-up,

ports are always reset to the Input mode.

B IrrelevantWord for DMA or Rep-String

A controls both portsWord for I/O5-7 (Word)1-Word

B IrrelevantWord for DMA or Rep-String

A controls both portsByte for I/O5-7 (word)0-Byte

B IrrelevantByte (PA) for DMA or Rep-String

A controls both portsWord for I/O0-3 (byte)1- Word

Byte for DMA or Rep-String

A & B IndependentByte for I/O0-3 (byte)0-Byte

A & B DirectionPort I/ODMA LevelBit D2

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 31 32

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Measurement-computing CIO-PDMAxx Instrukcja Użytkownika Strona 17