DS5002FP_1 Datasheet, PDF (12/29 Pages) Dallas Semiconductor – Secure Microprocessor Chip

DS5002FP
MEMORY ORGANIZATION
Figure 3 illustrates the memory map accessed by the DS5002FP. The entire 64k of program and 64k of
data are potentially available to the byte-wide bus. This preserves the I/O ports for application use. The
user controls the portion of memory that is actually mapped to the byte-wide bus by selecting the program
range and data range. Any area not mapped into the NV RAM is reached via the expanded bus on ports 0
and 2. An alternate configuration allows dynamic partitioning of a 64k space as shown in Figure 4.
Selecting PES=1 provides another 64k of potential data storage or memory mapped peripheral space as
shown in Figure 5. These selections are made using Special Function Registers. The memory map and its
controls are covered in detail in the User’s Guide section of the Secure Microcontroller Data Book.
DS5002FP MEMORY MAP IN NON-PARTITIONABLE MODE (PM=1) Figure 3
12 of 29