Changes between Version 139 and Version 140 of gsc
- Timestamp:
- 11/05/2026 11:57:19 PM (27 hours ago)
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gsc
v139 v140 1023 1023 [=#tamper] 1024 1024 == Tamper Detection == 1025 Some boards have a ''Tamper Detect'' circuit implemented either as a physical pushbutton on the board and/or a header that can have an external switch wired to it. The circuit implemented is a ''normally open'' switch to board ground (GND). 1025 Some boards have a ''Tamper Detect'' circuit implemented either as a physical pushbutton on the board and/or a header that can have an external switch wired to it. The circuit implemented is a ''normally open'' switch to board ground (GND). The switch is tied to ground when the enclosure is shut. When the enclosure 'opens' then the signal is not tied to ground (there is a pullup in the GSC internally). 1026 1026 1027 1027 For these boards you can enable the GSC's ''Tamper Detect'' feature by setting [#gsc_ctrl_0 TAMPER_DETECT (R0.5)] and the accompanying interrupt enable register bit [#gsc_interrupt_enable IRQ_TAMPER_DETECT (R11.5)]. Once these bits are set any tamper event produced by a switch opening and the signal not conducting to board ground will do the following:
