This configuration constant determines the type of memory used for dynamic memory allocation by the stMemAlloc function. When the value is set to 1, a global buffer is created with the size specified in ST_MALLOC_SIZE, which defaults to 8192 bytes (8 KB). When this value is set to 0, the memory base address must be defined in ST_MALLOC_BASE_ADDRESS and the memory size must be specified in ST_MALLOC_SIZE (which has no default value in this case).