Lock-step Operation

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

When the Cortex-R5F processors are in the lock-step mode (This Figure), there should be code in the reset handler to ensure that the distributor within the GIC dispatches interrupts only to CPU0. During the lock-step operation, the TCMs that are associated with the redundant processor become available to the lock-step processor. The size of ATCM and BTCM become 128 KB each with BTCM supporting interleaved accesses from processor and AXI slave interface.

Figure 4-5:      TCMs in Lock-step Mode

X-Ref Target - Figure 4-5

X15297-tcm-lock-step.jpg