Si4430
Preliminary Rev. 0.4
139
Reset value = xxxxx000
Reset value = xxxxx000
Register 6Bh. GFSK FIR Filter Coefficient Address
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
firadd[2:0]
Type
R
R/W
Bit
Name
Function
7:3
Reserved
Reserved.
2:0
firadd[2:0]
GFSK FIR Filter Coefficient Look-up Table Address.
The address for Gaussian filter coefficients used in the TX path. The default GFSK set-
ting is for BT = 0.5. It is not needed to change or load the GFSK Coefficients if BT = 0.5 is
satisfactory for the system.
000:
i_coe0 (Default = d1)
001:
i_coe1 (Default = d3)
010:
i_coe2 (Default = d6)
011:
i_coe3 (Default = d10)
100:
i_coe4 (Default = d15)
101:
i_coe5 (Default = d19)
110:
i_coe6 (Default = d20)
Register 6Ch. GFSK FIR Filter Coefficient Value
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
firval[5:0]
Type
R/W
R/W
Bit
Name
Function
7:6
Reserved
Reserved.
5:0
firval[5:0]
FIR Coefficient Value in the lOok-up Table Addressed by the firadd[2:0].
The default coefficient can be read or modified.
