RF31 Hope Microelectronics co., Ltd, RF31 Datasheet - Page 116

• Manufacturer Part Number: RF31
• Description: Rf31 Ism Receiver
• Manufacturer: Hope Microelectronics co., Ltd

Register 57h. Charge Pump Test
Reset value = 00000000
Register 58h. Charge Pump Current Trimming/Override
Reset value = 100xxxxx
Name
Name
Type
Type
Bit
Bit
2:0
7:6
4:0
Bit
Bit
7
6
5
4
3
5
Tel: [phone]
pfdrst
R/
D7
D7
w
cdcurr[2:0]
cpcurr[1:0]
cpforceup
cpforcedn
cporr[4:0]
fbdiv_rst
cpcorrov
Name
Name
cdonly
pfdrst
cpcurr[1:0]
R/
w
fbdiv_rst
R/
D6
D6
w
Direct Control to Analog.
Direct Control to Analog.
Charge Pump Force Up.
Charge Pump Force Down.
Charge Pump DC Offset Only.
Charge Pump DC Current Selection.
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.
Fax: [phone]
cpforceup
cpcorrov
R/
D5
D5
R/
w
w
cpforcedn
R/
D4
D4
w
E-mail: [e-mail]
cdonly
Function
Function
D3
D3
R/
w
cporr[4:0]
R/
D2
D2
w
http://www.hoperf.com
cdcurr[2:0]
R F 3 1
D1
D1
R/
w
D0
D0
116