Measurement-computing PCI-DIO48H/CTR15 Bedienungsanleitung PDF herunterladen (Seite 13)

CONTROL REGISTER 1

BADR2 + 03h

WRITE only

D0D1-D3D4---

01234567

The operating mode of the digital I/O ports is Mode 0. The control register therefore

is used to set the ports for inputs or outputs at the connector. For example, to set all

ports to output, write the value 0h to Base + 3. To set all ports to input, write the

value 1Bh to Base + 3. The user can read the current state of an output port by simply

reading that port when configured to be output.

D7, D6, D5, and D2 are ‘don’t care’. They are shown as ‘0’ below. ‘CU’ is PORT C

upper nibble, ‘CL’ is PORT C lower nibble.

Table 5-2. DI/O Configuration Coding

ININININ271B1111

OUTINININ261A0111

INOUTININ25191011

OUTOUTININ24180011

ININOUTIN19131101

OUTINOUTIN18120101

INOUTOUTIN17111001

OUTOUTOUTIN16100001

INININOUT11B1110

OUTININOUT10A0110

INOUTINOUT991010

OUTOUTINOUT880010

ININOUTOUT331100

OUTINOUTOUT220100

INOUTOUTOUT111000

OUTOUTOUTOUT000000

CLCUBADecHexD0D1D3D4

DIO PORT VALUES CONTROL REG. CODES

PORT 2A DATA

BADR2 + 04h

READ/WRITE

A0A1A2A3A4A5A6A7

01234567

PORT 2B DATA

BADR2 + 05h

READ/WRITE

B0B1B2B3B4B5B6B7

01234567

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 27 28

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Measurement-computing PCI-DIO48H/CTR15 Bedienungsanleitung Seite 13