3.4 Status reporting.
MLC8xxx / page 63
3.4.8 Device error condition register (DEC)
The bits of this register show the errors, that occur during operation (operation
errors). The bits are active high.
If the error disappears, the bits are reset to low.
For MLC8xxx laser diode controller modules bits 0 ... 4, 8 and 11 are used:
(0) Over temperature
Laser temperature too high. Wait until the module has
cooled down. Maintain proper air flow.
(1) Open circuit
Laser diode circuit is open.
(2) Interlock open
The interlock has opened or path resistance is >430
Ω
.
(3) Current limit
The current limit is reached and the protection circuit is
active now. Noise and drift specs are not valid any more.
(4) Temperature out of window
Appropriate laser temperature (controlled by
an TEC-module) is out of specified window.
(8) Power supply error
Internal power supply error.
(11) Power limit
The given hard- or software power limit is reached.
The DEC can be read but not set. Reading does not clear the DEC.
3.4.9 Device error event register (DEE)
The bits of this register hold the errors, that occurred during operation (operation
errors). So each bit of the DEC sets the according bit of the DEE.
The DEE can be read but not set. Reading clears the DEE.
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