Application work area

UM1599

14/17

DocID024146 Rev 1

5.6.1

Reading

The device can be read once or continuously by checking/unchecking the "Continuous"

check box. For a single reading, a default value of two register readings is set in the

"Readings" numeric text box, in order to have at least two data to correctly compute power

values. The time (in ms) can be also set between two readings through the "Interval"

numeric text box. Pressing the "Read" button, the device reading is performed.

This operation is not available for STPM11, STPM12, STPM13 and STPM14 devices.

5.6.2

Samples reading

To perform the samples reading, the "Samples" check box has to be checked, then the

"Read" button has to be pressed. It is possible to choose:

•

the number of samples ("Readings" numeric text box)

•

the delay between samples reading in ms ("Delay" numeric text box)

After the samples reading is completed, a form (in Figure 13) is opened displaying in a grid

all the data taken from the registers and the corresponding energy values in two different

tabs.

Figure 13. Samples reading form

5.6.3

Write to shadow memory latches

The "Write SHL" button allows all the bits to be written and set temporarily in the

configurator area.

5.6.4

Write to OTP memory

The "Write OTP" button allows all the bits, set in the configurator area, to be written

permanently. If the USB interface is used, a proper voltage source should be connected to

the device VOTP pin (not available for STPM10).

5.6.5

"Reset" button performs a software reset of the device

"Reset" button performs a software reset of the device.