CC2520_11 Datasheet, PDF (91/133 Pages) Texas Instruments – 2.4 GHZ IEEE 802.15.4/ZIGBEE RF TRANSCEIVER

CC2520 DATASHEET
2.4 GHZ IEEE 802.15.4/ZIGBEE® RF TRANSCEIVER
SWRS068 – DECEMBER 2007
25 Memory Management Instructions
CC2520 has several instructions for managing the memory contents. These instructions are supported in
order to allow the user to manipulate the memory contents in a flexible way so that SPI traffic is reduced to a
minimum. These instructions are particularly useful when working with secure frames.
Note that the parameters for these instructions may be set to values that make the blocks of input data and
output data overlap. This is perfectly OK for all instructions except MEMCPR which will only work with
overlapping input/output if C≤16. For example: to shift a 9 byte block of data one byte up, the MEMCP
instructions can be used as follows: MEMCP(P=0,C=9,A=0x22A,E=0x22B).
Figure 34: Illustration of the memory management instructions
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