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AT86RF231
or TRAC_STATUS = SUCCESS_DATA_PENDING if the frame pending subfield of the received
ACK frame was set to 1.
7.2.5
Interrupt Handling
The interrupt handling in the Extended Operating Mode is similar to the Basic Operating Mode,
refer to Section 7.1.3 “Interrupt Handling” on page 38 . The microcontroller enables interrupts by
setting the appropriate bit in register 0x0E (IRQ_MASK).
For RX_AACK and TX_ARET the following interrupts inform about the status of a frame recep-
tion and transmission:
Table 7-13.
Interrupt Handling in Extended Operating Mode
Mode
RX_AACK
TX_ARET
Both
Interrupt
IRQ_2 (RX_START)
IRQ_5 (AMI)
IRQ_3 (TRX_END)
IRQ_3 (TRX_END)
IRQ_0 (PLL_LOCK)
Description
Indicates a PHR reception
Issued at address match
Signals completion of RX_AACK transaction if successful
-
A received frame must pass the address filter
-
The FCS is valid
Signals completion of TX_ARET transaction
Entering RX_AACK_ON or TX_ARET_ON state from
TRX_OFF state, the PLL_LOCK interrupt signals that the
transaction can be started
RX_AACK
For RX_AACK it is recommended to enable IRQ_3 (TRX_END). This interrupt is issued only if a
frame passes the frame filtering, refer to Section 7.2.3.5 “Frame Filtering” on page 61 and has a
valid FCS. This is in contrast to Basic Operating Mode, refer to Section 7.1.3 “Interrupt Handling”
on page 38 . The use of the other interrupts is optional.
On reception of a valid PHR an IRQ_2 (RX_START) is issued. IRQ_5 (AMI) indicates address
match, refer to filter rules in Section 7.2.3.5 “Frame Filtering” on page 61 , and the completion of
a frame reception with a valid FCS is indicated by interrupt IRQ_3 (TRX_END).
Thus, it can happen that an IRQ_2 (RX_START) and/or IRQ_5 (AMI) are issued, but no IRQ_3
(TRX_END) interrupt.
TX_ARET
In TX_ARET interrupt IRQ_3 (TRX_END) is only issued after completing the entire TX_ARET
transaction.
Acknowledgement frames do not issue IRQ_5 (AMI) or IRQ_3 (TRX_END) interrupts.
All other interrupts as described in Section 6.6 “Interrupt Logic” on page 29 , are also available in
Extended Operating Mode.
67
8111C–MCU Wireless–09/09
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