Figure 4: Memory layout
Shows code RAM beginning at 0x0080 0000 but nRF52832 Engineering A Errata 33
"Code RAM is located at address 0x0800_0000".
Additionally 0x2100 1000 should be 0x2000 1000
Also perhaps something like a the attached figure segment for figure 5 memory map, would provide a better understanding of Code RAM