National Instruments AT-MIO-64F-5, User Manual

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Chapter 4 Register Map and Descriptions
© National Instruments Corporation 4-57 AT-MIO-64F-5 User Manual
Digital Output Register
Writing to the Digital Output Register controls the eight AT-MIO-64F-5 digital I/O lines. The
Digital Output Register controls both ports A and B. When either digital port is enabled, the
pattern contained in the Digital Output Register is driven onto the lines of the digital port.
Address: Base a 1C (hex)
Type: Write-only
Word Size: 16-bit
Bit Map:
15 14 13 12 11 10 9 8
0 0 0 0 0 0 0 0
MSB
7 6 5 4 3 2 1 0
BDIO3 BDIO2 BDIO1 BDIO0 ADIO3 ADIO2 ADIO1 ADIO0
LSB
Bit Name Description
15-8 0 Reserved Ð These bits must always be set to zero.
7-4 BDIO<3..0> These four bits control the digital lines BDIO<3..0>. The bit
DIOPBEN in Command Register 3 must be set for BDIO<3..0> to
be driven onto the digital lines BDIO<3..0>.
3-0 ADIO<3..0> These four bits control the digital lines ADIO<3..0>. The bit
DIOPAEN in Command Register 3 must be set for ADIO<3..0> to
be driven onto the digital lines ADIO<3..0>.