Sensoray 518 User Manual

Page 32

Low Power Standby

This command places the sensor coprocessor in a low-power standby mode. Power consumption
is reduced by halting the logic clock, thereby minimizing current draw in the coprocessor logic
circuitry section. The analog section remains fully powered to eliminate warmup noise when full
power resumes. See the Theory of Operation for a discussion of warmup noise.

COMMAND: (67)
RESPONSE: NONE

EXAMPLE:

CALL Send518byte (67) ’ Switch the 518 to Low Power Standby mode

After releasing the 518 from the low power standby mode, the host should wait at least 600
milliseconds before communicating again with the coprocessor. This delay will give the 518 time
to self-calibrate and acquire good sensor data before any data requests from the host. To release
the coprocessor from standby, invoke the Release Standby command as follows:

COMMAND: (66)
RESPONSE: NONE

EXAMPLE:

CALL Send518byte (67) ‘ Release the 518 from Low Power Standby mode
CALL delay(600) ‘ don’t talk to the 518 for at least 600 milliseconds