MRF24J40_08 Datasheet, PDF (130/152 Pages) Microchip Technology – IEEE 802.15.4™ 2.4 GHz RF Transceiver

MRF24J40
3.18 Turbo Mode
The MRF24J40 provides a Turbo mode to transmit and
receive at 625 kbps (2.5 times 250 kbps). This mode
enables higher data rates for proprietary protocols.
To configure the MRF24J40 for Turbo mode, perform
the following steps:
1. Enable Turbo mode by setting the TURBO
(BBREG0 0x38<0>) bit = 1.
2. Set the baseband parameter, PREVALIDTH
(BBREG3 0x3B<7:4>) bits = 0011.
3. Set baseband parameter, CSTH (BBREG4
0x3C<7:5>) bits = 010.
4. Perform a baseband circuitry Reset, RSTBB
(SOFTRST 0x2A<1>) = 1.
TABLE 3-27: REGISTERS ASSOCIATED WITH TURBO MODE
Addr. Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
0x2A SOFTRST
0x38 BBREG0
0x3B BBREG3
0x3C BBREG4
r
r
r
r
r
r
r
r
r
r
PREVALIDTH3 PREVALIDTH2 PREVALIDTH1 PREVALIDTH0 PREDETTH2
CSTH2
CSTH1
CSTH0
PRECNT2
PRECNT1
RSTPWR
r
PREDETTH1
PRECNT0
RSTBB
r
PREDETTH0
r
Bit 0
RSTMAC
TURBO
r
r
DS39776B-page 128
Preliminary
© 2008 Microchip Technology Inc.