si4430 Silicon Laboratories, si4430 Datasheet - Page 129

• Manufacturer Part Number: si4430
• Description: Si4430 Ism Transceiver
• Manufacturer: Silicon Laboratories

Register 58h. Charge Pump Current Trimming/Override
Register 59h. Divider Current Trimming/Delta-Sigma Test
Reset value = 100xxxxx
Reset value = 10000000
Name
Name
Type
Type
Bit
Bit
7:6
4:0
5:4
3:2
1:0
Bit
Bit
5
7
6
txcorboosten
d1p5trim[1:0] Divider 1.5 (div-by-1.5) Current Trim Value.
txcorboosten If this is Set, then vcocorr (reg 5A[5:2]) = 1111 during TX Mode and VCO CAL fol-
cpcurr[1:0]
cpcorr[4:0]
d3trim[1:0]
d2trim[1:0]
cpcorrov
fbdivhc
R/W
Name
Name
D7
D7
cpcurr[1:0]
R/W
Charge Pump Current (Gain Setting).
Changing these bits will change the BW of the PLL. The default setting is adequate for all
data rates.
Charge Pump Correction Override Enable.
Charge Pump Correction Value.
During read, you read what the Charge Pump sees. If cpcorrov = 1, then the value you
write will go to the Charge Pump, and will also be the value you read. By default,
cpcorr[4:0] wakes up as all Zeros.
fbdivhc
lowed by TX.
Feedback (fractional) Divider High Current Enable (+5 µA).
Divider 3 Current Trim Value.
Divider 2 Current Trim Value.
R/W
D6
D6
cpcorrov
R/W
D5
D5
d3trim[1:0]
R/W
Preliminary Rev. 0.4
D4
D4
Function
Function
D3
D3
d2trim[1:0]
R/W
cporr[4:0]
R/W
D2
D2
D1
D1
d1p5trim[1:0]
Si4430
R/W
D0
D0
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