rtd cpuModule CMX47786HX, User Manual

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CMX47786HX RTD Embedded Technologies, Inc.
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Strobe0 Status Strobe1 Status
0 = no strobe 0 = no strobe Port 1 Direction
1 = strobe 1 = strobe 0 = Input Multi-Function
1 = Output Register Select
Digital IRQ Status Digital IRQ Enable 00 = Clear Mode
0 = no digital interrupt 0 = Disabled 01 = Port 0 Direction
1 = digital interrupt 1 = Enabled 10 = Mask Register
11 = Compare Register
Digital IRQ Mode
0 = Event Mode
1 = Match Mode
Port 1 Direction
0 = Input
Multi-Function
1 = Output Register Select
Reserved IRQ Mode 00 = Clear Mode
00 = Disabled 01 = Port 0 Direction
01 = Strobe 10 = Mask Register
10 = Event 11 = Compare Register
11 = Match
Clear Register:
A read to this register Clears the IRQs and a write to this register sets the DIO-Compare, DIO-
Mask, DIO-Control, Port1 and Port0 to zeros. A write to this register is used to clear the board.
Port 0 Direction Register:
Writing a zero to a bit in this register makes the corresponding pin in the DIO connector an input.
Writing a one to a bit in this register makes the corresponding pin in the DIO connector an output.
Mask Register:
Writing a zero to a bit in this register will not mask off the corresponding bit in the DIO-Compare
register. Writing a one to a bit in this register masks off the corresponding bit in the
DIO-Compare register. When all bits are masked off the DIOs comparator is disabled. This
condition means Event and Match mode will not generate an interrupt. This register is used by Event
and Match modes.
Compare Register:
A Read/Write register used for Match Mode. Bit values in this register that are not masked off are
compared against the value on Port 0. A match or Event causes bit 6 of DIO-Control to be set and if
the DIO is in Advanced interrupt mode, the Match or Event causes an interrupt.
DIO-Control I/O address aDI 3 Read Access
D7 D6 D5 D4 D3 D2 D1 D0
DIO-Control I/O address aDI 3 Write Access
D7 D6 D5 D4 D3 D2 D1 D0
Multi-Function, at aDI 2, Contents Based on Bits D[1:0] of DIO-Control
read/write 00 Clear X X X X X X X X
0 = in/1 = out 01 Port 0 Dir I/O I/O I/O I/O I/O I/O I/O I/O
0 = no mask/1 = mask 10 DIO Mask M7 M6 M5 M4 M3 M2 M1 M0
read/write 11 Compare C7 C6 C5 C4 C3 C2 C1 C0