Nexcom DNA 1120 - Bypass Control Status Register (Segment 1 Only); Bypass Mode Table

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Appendix B: Bypass Specifications

DNA 1120/1120A User Manual

Bypass Control Status Register (Segment 1 only)

Bit Field Name Value

0 Segment 1 Segment control bit mask.

Write:

If a segment mask bit is set to false (0), no action on that

segment will take place.

If a segment mask bit has been set to true (1), action will

take place on this segment according to the bypass mode

settings in bits 7:6.

1 Not used No activity taken if written, value is undetermined and not

needed on read operation.

2 Not used No activity taken if written, value is undetermined and not

needed on read operation.

3 Not used No activity taken if written, value is undetermined and not

needed on read operation.

4 Not used No activity taken if written, value is undetermined and not

needed on read operation.

5 Not used No activity taken if written, value is undetermined and not

needed on read operation.

7:6 Bypass mode These two bits defined the bypass mode for one or more

segments. These bits are Write only and on reads returns

undetermined values which will be ignored by the driver.

Bypass Mode Table

Bit 7 Bit 6 Action

0 0 Ignore, no action taken.

0 1 Force Enable - Engage bypass relays on segments enabled in

segment mask.

1 0 Force Disable - Disable bypass relays immediately on seg-

ments enabled in mask.

1 1 Timer Enable - Segments enabled in mask are under Timer

control.