3.4.12 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 SAMA7D65 Curiosity Pro board provides two 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 3-28. J73 Signal Description
Signal Name	Signal Description
AUX_IO0_0.PIOBU2	Tamper I/O 2
AUX_IO0_0.PIOBU3	Tamper I/O 3
AUX_IO0_0.AUDIOCLK	Dedicated audio clock signal
PMIC_0.SHDN	Signal used to enable and disable an external power supply circuit
AUX_IO0_0.JTAGSEL	When pulled high, enables the JTAG boundary scan

Table 3-29. J74 Signal Description
Signal Name	Signal Description
PMIC_0.HPM	PMIC High-Power mode enable
nRST0_0.nRST_OUT	Peripheral reset output
nRST0_0.nRST	Processor reset input