3.4.14 Tamper and System Signal Connectors

Unused signals and PIOs provided by the MPU are routed to separate connectors, J73 and J74. System signals are also accessible externally on these connectors.

The SAM9X75 Curiosity Pro board provides tamper pins for static or dynamic intrusion detection on header J73. The audio clock, shutdown and JTAGSEL signals are also present on the same connector.

Unused and available system signals are available on header J74.

Figure 3-44. Tamper and System Signals Connectors

The tables below provide a signal description of headers J73 and J74.

Table 3-22. J73 Signal Description
Signal NameSignal Description
AUX_IO0_0.PIOBU2Not connected
AUX_IO0_0.PIOBU3Not connected
AUX_IO0_0.AUDIOCLKDedicated audio clock signal
PMIC_0.SHDNSignal used to enable and disable an external power supply circuit
AUX_IO0_0.JTAGSELWhen pulled high, enables the JTAG boundary scan
Table 3-23. J74 Signal Description
Signal NameSignal Description
PMIC_0.HPMPMIC High-Power mode enable
nRST0_0.nRST_OUTPeripheral reset output
nRST0_0.nRSTProcessor reset input