MRF24XA_15 Datasheet, PDF (45/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
REGISTER 2-25:
bit 7
CSMABE (CSMA-CA BACK-OFF EXPONENT CONTROL REGISTER)
ADDRESS: 0x1A
R/W-0101
R/W-0011
MAXBE<3:0>
MINBE<3:0>
bit 0
Legend: R = Readable bit W = Writable bit
-n = Value at POR
‘1’ = Bit is set
r = Reserved
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-4
bit 3-0
MAXBE<3:0>: CSMA-CA Back-off Maximum Count Field bits
The maximum value of the Back-off exponent (BE), in the CSMA-CA algorithm. The back-off time is
(2^BE-1) units.
1111 = Reserved
•
•
•
1001 = Reserved
1000 2⁸-1 = 255 maximum units of back-off time
•
•
•
0000 2⁰-1 = No back-off time
MINBE<3:0>: CSMA-CA Back-off Minimum Count bits
The minimum value of the back-off exponent (BE), in the CSMA-CA algorithm. The back-off time is
(2^BE-1) units.
1111 = Reserved
•
•
•
1001 = Reserved
1000 2⁸-1 = 255 maximum units of back-off time
•
•
•
0000 2⁰-1 = No back-off time
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 45