MRF24XA_15 Datasheet, PDF (99/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
TABLE 4-2: SUMMARY OF NODE CONFIGURATION OPTIONS
NODE CONFIGURATION
Packet Mode
IEEE
Proprietary Proprietary
802.15.4™
Repeater
Propr. TX
Stream
Propr. RX
Stream
TRXMODE (00: Packet Mode)
00
00
00
10
01
FRMFMT (Std:0, Proprietary:1)
0
1
1
1
1
AUTORPTEN (Repeater Node:1)
0
0
1
0
0
FEATURE/FRAME
NODE CAPABILITY
CSMAEN (CSMA enable:1)
0 or 1
0 or 1
0 or 1
0
No TX
CRCSZ (CRC 2 bytes: 1, none: 0)
AUTOACKEN (Auto-ACK enable:1)⁽³⁾
1 (or 0)
0 or 1
0 or 1
0 or 1
0 or 1
0 (or 1⁽¹⁾)
0 or 1
0
0 or 1
0,
ignore 1
Retransmission capability
Yes
Yes
No
No
No
Buffer Handling
With IEEE 802.15.4 Frames,
capability to:
1 RX, 1 TX
TX, RX
1 RX, 1 TX
RX (TX)⁽⁴⁾
(bridging)
2 TRX
discard
2 TX
n/a
2 RX
discard
With Proprietary Non-Streaming Type
discard
TX, RX
Repeat if
n/a
of Frames (Repeat:0/1), capability to:
Repeat = 1
discard
With Proprietary Streaming Type of
discard
RX (sets
discard
TX
RX
Frames, capability to:
on RX-
Streaming)
Security Processing
Available Available
None
available but impractical
Channel Agility Support for ACK-ing
No
Yes
n/a
n/a
n/a
PHY-features
Available Data Rates
Same for all
All⁽²⁾
All
All
All
All
On-the-fly receiver rate adaptation
Yes
Yes
Yes
Yes
Yes
DSSS
Yes
Yes
Yes
Yes
Yes
Note 1:
2:
Proprietary frames requesting both Acknowledge and repeat are not recommended if any of the repeaters
has AUTOACKEN = 0, and vice versa. Setting all of these may cause issues.
Although 250 kbps is the only data rate that ensures compliance to the IEEE 802.15.4 standard, however
as an extension, the other data rates can also be used with the standard MAC format, which may be easier
to integrate with the legacy software.
3: CRCSZ = 0 has no practical use in Standard-Format mode. If CRCSZ = 0 then AUTOACKEN = 0 and
RXFILTER = 0x00 is required.
4: Acknowledge sending is solved. To send a frame, the transmitter changes FRMFMT for the sending.
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 99