Status reporting
IEEE 488.2 compatible Status Structures
The Events Filtering Positive Mask Register
SENSE
WARN
CONF
TEST
FOLD
BACK
MODE
CHNG
LOW
CURR.
LOW
VOLT.
HIGH
CURR.
HIGH
VOLT.
Bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Set with CMASK read with CMASK?
The Events Filtering Negative Mask Register
SENSE
WARN
0 FOLD
BACK
MODE
CHNG
LOW
CURR.
LOW
VOLT.
HIGH
CURR.
HIGH
VOLT.
Bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Set with CMASK read with CMASK?
SENSE WARN.....Sense lines excessive voltage drop warning (over
2.5V and below 4V) start/stop.
CONF TEST .........Confidence test (BIT) errors. NOTE: this condition
has no negative transition.
FOLD BACK........Fold-Back mode activated/deactivated.
MODE CHNG ......Current Mode activated/deactivated.
LOW CURR. ........Low Current Window Warning start/stop.
LOW VOLT. ........Low Voltage Window Warning start/stop.
HIGH CURR. .......High Current Window Warning start/stop.
HIGH VOLT.........High Voltage Window Warning start/stop.
The Events Filtering Mechanism enables the user to filter out non critical events (e.g.
Window Warning, Current limit etc.). Critical events (such as OVP) can not be filtered.
The Events Filtering Mechanism has separate filters for the positive and the negative
transition generated events. For example: the occurrence of a current limit condition is a
positive transition (the Power Module entered the current limit state) while the end of the
current limit condition is the negative transition.
The “start” or “activated” indication in the above refers to a positive
transition while the “stop” or “deactivated” indication refers to a negative
transition.
The negative transition of the FOLD BACK and MODE CHNG events
occur simultaneously. Therefore, when any of the relevant bits of the
Negative Mask Register are set, the Power Module will generate an event
as though both bits were set.
XMP 2600 Programming Manual
rev. 1.1
71
