MRF24XA_15 Datasheet, PDF (191/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
7.2 Data Rate Agility
Similar to Channel Agility as described in Figure 7.1,
ACK is sent at different data rates within different
nodes. It may provide more robust ACK sending mech-
anism in busier networking environments. Data Rate
Agility is enabled by the ADPTDREN bit that must be
set for all the nodes within the same network. Data
Rate Agility is based on AckInfo field of the Proprietary
MAC header. Proprietary MAC header is described in
Figure 6-1. AckInfo field is described in Figure 7-1.
Figure 4-13 describes the ACK sending mechanism.
REGISTER 7-2: RXCON2 (MAC RECEIVE CONTROL 2 REGISTER)
ADDRESS: 0x16
R/C/HS-0
R/W-0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
RXBUFFUL IDENTREJ ACKRXFP ACKTXFP AUTORPTEN AUTOACKEN ADPTCHEN ADPTDREN
bit 7
bit 0
Legend: R = Readable bit W = Writable bit
-n = Value at POR
‘1’ = Bit is set
r = Reserved
HS = Hardware Set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
C = Clearable bit
bit 7-1
bit 0
Out of scope
ADPTDREN: Adaptive Data Rate Enable bit⁽¹⁾
Setting this bit enables the MAC to set the transmission data rate for the ACK packet based on the
AckInfo field (Proprietary packet) of the received packet, rather than the DR<2:0> register bits.
1 = Adaptive Data Rate feature is enabled
0 = Adaptive Data Rate feature is disabled
Note 1: Use ADPTDREN field while receiving and transmitting, and must be unmodified while RXEN or TXST is
set.
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 191