mrf89xa Microchip Technology Inc., mrf89xa Datasheet - Page 32

• Manufacturer Part Number: mrf89xa
• Description: Ultra-low Power, Integrated Ism Band Sub-ghz Transceiver
• Manufacturer: Microchip Technology Inc.

2.14
2.14.1
REGISTER 2-1:
DS70622B-page 32
MRF89XA
bit 7
R = Readable bit
-n = Value at POR
r = Reserved
bit 7-5
bit 4-3
bit 2-1
bit 0
R/W-0
General Configuration Registers
GENERAL CONFIGURATION
REGISTER DETAILS
CMOD<2:0>: Chip Mode bits
These bits select the mode of operation of the transceiver.
111 = Reserved; do not use
110 = Reserved; do not use
101 = Reserved; do not use
100 = Transmit mode
011 = Receive mode
010 = Frequency Synthesizer mode
001 = Stand-by mode (default)
000 = Sleep mode
FBS<1:0>: Frequency Band Select bits
These bits set the frequency band to be used in Sub-GHz range.
11 = Reserved
10 = 950-960 MHz or 863- 870 MHz (application circuit dependant)
01 = 915-928 MHz (default)
00 = 902-915 MHz
VCOT<1:0>: TX bits
For each AFC cycle run, these bits will toggle between logic ‘1’ and logic ‘0’.
11 = Vtune + 180 mV typ
10 = Vtune + 120 mV typ
01 = Vtune + 60 mV typ
00 = Vtune determined by tank inductors values (default)
RPS: RPS Select bit
This bit selects between the two sets of frequency dividers of the PLL, Ri/Pi/Si. For more information,
see Section 3.2.7 “Frequency Calculation”.
1 = Enable R2/P2/S2 set
0 = Enable R1/P1/S1 set (default)
CMOD<2:0>
R/W-0
GCONREG: GENERAL CONFIGURATION REGISTER
(ADDRESS:0X00) (POR:0X28)
W = Writable bit
‘1’ = Bit is set
R/W-1
R/W-0
Preliminary
FBS<1:0>
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-1
R/W-0
VCOT<1:0>
© 2010 Microchip Technology Inc.
x = Bit is unknown
R/W-0
R/W-0
RPS
bit 0