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Si4430
Preliminary Rev. 0.4
143
Reset value = 00100000
Note:
It's recommended to use modulation index of 1 or higher (maximum allowable modulation index is 32). The modulation
index is defined by 2F
N
/F
R
were F
D
is the deviation and R
B
is the data rate. When Manchester coding is enabled the
modulation index is defined by F
D
/R
B
.
Reset value = 00000000
Reading from this register will give the AFC correction last results, not this register value.
Register 72h. Frequency Deviation
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
fd[7:0]
Type
R/W
Bit
Name
Function
7:0
fd[7:0]
Frequency Deviation Setting.
See formula above.
Register 73h. Frequency Offset 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
fo[7:0]
Type
R/W
Bit
Name
Function
7:0
fo[7:0]
Frequency Offset Setting.
The frequency offset can be calculated as Offset = 312.5 Hz x fo[7:0]. fo[9:0] is a twos
complement value. Reading from this register will give the AFC correction last results, not
this register value.