MRF24XA_15 Datasheet, PDF (17/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

2.6.2 ADDRESS
When using a Short Addressing mode, the Address
field is 6 bits wide to reduce framing overhead while
accessing the mostly active registers (0x00..0x3F). In
Long Addressing mode, the Address field is 10 bits
wide (0x00..0x3FF) thus all the address is available for
SPI operation.
2.6.3 AUTOMATIC TX START FEATURE
When a write to TRXBUF is done using Long Address-
ing mode and the 3rd bit of Byte 2 is set, the TXST bit
automatically sets after the CS pin is released, and
then MRF24XA sends the packet.
FIGURE 2-4:
SPI FRAMING TYPES
MRF24XA
2.6.4
AUTOMATIC BUFFER FLUSH
FEATURE
When a read from TRXBUF is done using Long
Addressing mode and the 3rd bit of Byte 2 is set, the
BUFFULL bit automatically becomes cleared after the
CS pin is negated.
2.6.5
ADDRESS AUTO-INCREMENT
FEATURE
After the starting address is loaded, the first byte of
data is read from or written to this address. The second
byte (assuming the CS pin is not negated between
bytes) is read from or written to the starting address
plus one, and so on.
If the memory map end is reached, the effective
address rolls over to the beginning of the memory map.
It is the sole responsibility of the software to handle this
situation correctly. Figure 2-4 illustrates the available
Address modes.
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 17