Zynq-7000 AP SoC by software reset

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The reset system includes resets generated by hardware, watchdog timers, the JTAG controller, and software. Every module and system in Zynq-7000 AP SoC devices includes a reset that is driven by the reset system. Hardware resets are driven by the power-on reset signal (PS_POR_B) and the system reset signal (PS_SRST_B).

The user can reset the entire system by asserting a software reset. By asserting PSS_RST_CTRL[SOFT_RST], the entire system is reset with the same end result as the user pressing the PS_SRST_B pin (other than the REBOOT_STATUS register value being different).

Just like the other system resets, all of the RAMs are cleared and the PL is reset as well.


Related register :

SLCR_LOCK
Relative Address : 0x00000004
Absolute Address : 0xF8000004
Width : 32 bits
Access Type : wo
Reset Value : 0x00000000
Description : SLCR Write Protection Lock

SLCR_UNLOCK
Relative Address : 0x00000008
Absolute Address : 0xF8000008
Width : 32 bits
Access Type : wo
Reset Value : 0x00000000
Description : SLCR Write Protection Unlock

 SLCR_LOCKSTA
Relative Address : 0x0000000C
Absolute Address : 0xF800000C
Width : 32 bits
Access Type : ro
Reset Value : 0x00000001
Description : SLCR Write Protection Status

 PSS_RST_CTRL
Relative Address : 0x00000200
Absolute Address : 0xF8000200
Width : 32 bits
Access Type : rw
Reset Value : 0x00000000
Description : PS Software Reset Control

reference file : ug585-Zynq-7000-TRM.pdf (chapter 26 : Reset System)

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