micrf405 Micrel Semiconductor, micrf405 Datasheet - Page 38

• Manufacturer Part Number: micrf405
• Description: Micrf405 290mhz To 980mhz Ism Band Ask/fsk Transmitter
• Manufacturer: Micrel Semiconductor

April 2006
VCO_freq2 VCO_freq1 VCO_freq0 Comments
Micrel
Manchester_en
Pream_Len1
MOD_A
Sel_CRC1
MOD_I
1..31
0..4
0
0
0
0
1
1
1
1
0
0
1
1
0
1
1
0
1
Comments
The deviation is linearly dependent of MOD_I
Comments
Frequency deviation attenuator (or range selector). The attenuations are (values 0 through 4, respectively)
1 ,
0
0
1
1
0
0
1
1
1
Pream_Len0
Comments
Manchester encoding disabled.
Manchester encoding enabled. Data will be encoded before transmitted.
FSKn > 0 when using modulator.
Sel_CRC0
1 ,
2
X
0
1
0
1
0
1
Table 41. Modulator Attenuator Setting for Frequency Deviation.
1 ,
Table 40. Modulator Current Setting for Frequency Deviation.
4
0
1
0
1
0
1
0
1
Table 38. Manchester Encoding (only when BIT_IO_en=0).
1
8
Comments
Preamble length is 1 byte.
Preamble length is 2 bytes.
Preamble length is 3 bytes.
Preamble length is 4 bytes.
Comments
CRC disabled
CCITT-8 CRC enabled. Byte is sent after payload data.
Polynomial function: X^8+X^5+X^4+1. (Byte part of Frame Length)
ITU-16 CRC enabled. Bytes are sent after payload data.
Polynomial function: X^16+X^12+X^5+1. (Byte part of Frame Length)
and
Not used
868 MHz, 433MHz
915 MHz
950MHz, 315MHz
1
Table 36. Preamble Field Length.
16
Table 39. VCO Frequency.
Table 37. CRC Select.
38
MICRF405
[phone]
M9999-041906