RFM68CW Datasheet, PDF (13/20 Pages) List of Unclassifed Manufacturers – Low Cost ISM Transmitter Module

RFM68CW
RFM68CW
Table 9 TWI Instruction Table
Byte 0
Byte 1
Byte 2
Instruction
76 543 210 76 543 210 76 543 210
0 0 0 0 (0000)
DA(15:0)
Write Application bits
00011
DF(18:0)
Write Frequency bits
0010
(0)(0010)(0010)
DT(10:0)
Write Test bits (pad protected)
0 0 1 1 (0011)
DA(15:0)
Read Application bits
0 1 0 0 (0100)
DF(15:0)
Read the 16 least significant Frequency bits
0 1 0 1 (0101)
DS(12:5)
DS(4:0)
DF(18: Read Chip version, Status and 3 most significant
16) Frequency bits
0 1 1 0 (0110)
DS(28:13)
Read Bist signature
0 1 1 1 (0111)
(1111)(1)
DT(10:0)
Read Test bits
1
x
Discarded, not an instruction
All 1
Recovery instruction
Notes - The first “0” transmitted to the RFM68CW is required to initialize communication
- The following 3 bits (highlighted in blue) determine the type of instruction
- The forthcoming bits (highlighted in green) define a protection pattern; any error in these bits voids the instruction
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