MRF24J40_08 Datasheet, PDF (59/152 Pages) Microchip Technology – IEEE 802.15.4™ 2.4 GHz RF Transceiver

MRF24J40
REGISTER 2-56: BBREG4: BASEBAND 4 REGISTER (ADDRESS: 0x3C)
R/W-1
CSTH2
bit 7
R/W-0
CSTH1
R/W-0
CSTH0
R/W-1
PRECNT2
R/W-1
PRECNT1
R/W-1
PRECNT0
R/W-0
r
R/W-0
r
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
bit 4-2
bit 1-0
CSTH<2:0>: Carrier Sense Threshold bits
100 = IEEE 802.15.4™ (250 kbps) optimized value (default)
010 = Turbo mode (625 kbps) optimized value
PRECNT<2:0>: Preamble Counter Threshold bits
111 = Optimized value (default)
Reserved: Maintain as ‘0’
REGISTER 2-57: BBREG6: BASEBAND 6 REGISTER (ADDRESS: 0x3E)
W-0
R/W-0
RSSIMODE1 RSSIMODE2
bit 7
R/W-0
r
R/W-0
r
R/W-0
r
R/W-0
r
R/W-0
r
R-1
RSSIRDY
bit 0
Legend:
R = Readable bit
-n = Value at POR
r = reserved
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5-1
bit 0
RSSIMODE1: RSSI Mode 1 bit
1 = Initiate RSSI calculation (bit is automatically cleared to ‘0’ by hardware)
RSSIMODE2: RSSI Mode 2 bit
1 = Calculate RSSI for each received packet. The RSSI value is stored in RXFIFO.
0 = RSSI calculation is not performed for each received packet (default)
Reserved: Maintain as ‘0’
RSSIRDY: RSSI Ready Signal for RSSIMODE1 bit
If RSSIMODE1 = 1, then
1 = RSSI calculation has finished and the RSSI value is ready
0 = RSSI calculation in progress
© 2008 Microchip Technology Inc.
Preliminary
DS39776B-page 57