CC2520_11 Datasheet, PDF (57/133 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
The second predefined exception channel includes exceptions that indicate general error conditions.
• MEMADDR_ERROR
• USAGE_ERROR
• OPERAND_ERROR
• SPI_ERROR
Figure 10 shows how the exceptions are linked to the instruction set of CC2520. Note that there are several
sources that may trigger instructions. The large or-gate illustrates that it only takes one of these sources to
trigger the execution of an instruction.
Figure 10: Functional details of exception handling and instruction triggering.
14.3 Binding Exceptions to Instructions (command strobes)
An exception can be bound to trigger a command strobe so that a command strobe can be automatically
executed when an exception occurs. There are two possible binding combinations, X and Y, defined in the
registers EXCBINDXn and EXCBINDYn.
Example
Run SACKPEND instruction when RX_FRM_ACCEPTED exception is activated.
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