Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/NXP Semiconductors/LPC18xx/CREG/ETBCFG#0x0
ETB=ETB_ACCESSES_SRAM_AT
ETB RAM configuration
Select SRAM interface
0 (ETB_ACCESSES_SRAM_AT): ETB accesses SRAM at address 0x2000 C000.
1 (AHB_ACCESSES_SRAM_AT): AHB accesses SRAM at address 0x2000 C000.
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data