System overview

UM1479

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Doc ID 022381 Rev 1

If the photo sensor output is lower than the level defined as DARK level, it is logged as NO

LIGHT in the EEPROM.

2.1.5

Switch press for tamper event simulation

The SW3 is a pushbutton switch which is used for the simulation of tamper detection.

In the case of event logger mode:

Whenever this switch is pressed, an event is logged inside the EEPROM as tamper event.

In the case of data logger mode:

At every second, the system checks for switch press. If the switch is pressed then it is

logged as tamper, or else no tamper is logged inside the EEPROM.

2.2

Hardware layout

Figure 18 and 19 below show the component layout to help the user locate different

components/sections on the board.

Figure 18.

Hardware layout: data logger top