Silicon Laboratories Si4430, Manual

Page: 134 / 152

S i 4 4 3 0
134 Preliminary Rev. 0.4
Reset value = 00000000
Reset value = xxx00100
Register 61h. Channel Filter Coefficient Value
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name
Reserved chfilval[5:0]
Type
R/W R/W
Bit Name Function
7:6 Reserved
Reserved.
5:0 chfilval[5:0]
Filter Coefficient Value in the Look-up Table Addressed by the chfiladd[3:0].
Register 62h. Crystal Oscillator/Power-on-Reset Control
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name
pwst[2:0] clkhyst enbias2x enamp2x bufovr enbuf
Type
R R/W R/W R/W R/W R/W
Bit Name Function
7:5 pwst[2:0]
Internal Power States of the Chip.
LP: 000
RDY: 001
Tune: 011
TX:
010
RX: 111
4 clkhyst
Clock Hysteresis Setting.
3 enbias2x
2 Times Higher Bias Current Enable.
2 enamp2x
2 Times Higher Amplification Enable.
1 bufovr
Output Buffer Enable Override.
If set to 1 then the enbuf bit controls the output buffer.
0: output buffer is controlled by the state machine.
1: output buffer is controlled by the enbuf bit.
0 enbuf
Output Buffer Enable.
This bit is active only if the bufovr bit is set to 1.