MRF24XA_15 Datasheet, PDF (158/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
FIGURE 5-15:
TRANSMITTER TXENC PROCESSING WHEN FRMFMT = 0 (IEEE 802.15.4™
FORMAT)
SW configured SECKEY, SECSUITE,
SECNONCE, SECHDRINDX,
SECPAYINDX and SECENDINDX.
TXENC
1
TXENC is only required for
NWK layer security
processing.
CTR, CBC-MAC and CCM
LENTGH is incremented when a MIC tag is attached. New
LENGTH must not exceed 0x7F. Otherwise TXSZIF is set.
0
TXSZIF?
1
TXENC
0
TXENCIF
1
TXENC
0
Interrupt Service
Length is affected. MAC MAC/NWK.
Exception Handling:
TXSZIF: Transmit Packet Size Error Interrupt Flag
TXST is set when the packet size (including MIC tags and CRC) is found to be zero or to be greater than the
maximum size that the buffers can support.
FRMIF: Frame Format Error Interrupt Flag
DS70005023C-page 158
Preliminary
 2015 Microchip Technology Inc.