Chapter
2 Register
Map and Descriptions
©
National Instruments Corporation
2-15
Static DIO Register-Level Programmer Manual
Change Status Register
The Change Status Register gives the status of change detection.
Address Offset:
0x02
Type:
Read
Size:
8-bit
Bit Map:
Bit
Name
Description
7–6
Reserved
Disregard these bits.
5
WDT Int Status
A 1 indicates that there has been a watchdog timer
expiration that could cause an interrupt (if
watchdog timer expiration interrupts are enabled).
4
Falling Edge Status
A 1 indicates that there has been a falling edge that
could cause an interrupt (if falling edge interrupts
are enabled).
3
Rising Edge Status
A 1 indicates that there has been a rising edge that
could cause an interrupt (if rising edge interrupts
are enabled).
2
MasterInterrupt Status
Indicates that the device is asserting an interrupt.
1
OverFlow
Indicates that at least one more edge has been
detected since an interrupt is asserted.
0
Edge Status
Indicates an edge has been detected. If the EdgeInt
bit is set in the Master Interrupt Control Register,
Edge Status set indicates an interrupt is currently
being asserted.
7
6
5
4
3
2
1
0
Reserved
Reserved
WDT Int
status
Falling
Edge
Status
Rising
Edge
Status
MasterInterrupt
Status
OverFlow
Edge
Status