CC2430 Datasheet, PDF (33/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
12.3.1 Memory Map
This section gives an overview of the memory
map.
The memory map differs from the standard
8051 memory map in two important aspects,
as described below.
First, in order to allow the DMA controller
access to all physical memory and thus allow
DMA transfers between the different 8051
memory spaces, parts of SFR and CODE
memory space is mapped into the XDATA
memory space.
Secondly, the CODE memory space mapping
can be selected so that all physical memory is
mapped to CODE space, by using a unified
mapping of the CODE memory space.
Details about mapping of all 8051 memory
spaces are given in the next section.
The memory map showing how the different
physical memories are mapped into the CPU
memory spaces is given in the figures on the
following pages for each flash memory size
option.
Note that for CODE memory space, the two
possible memory maps are shown; unified and
non-unified mapping.
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 33 of 232