cx24118a NXP Semiconductors, cx24118a Datasheet - Page 31

• Manufacturer Part Number: cx24118a
• Description: Advanced Modulation Digital Satellite Tuner
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Register 12
Register 14
CX24118A_N_2
Product data sheet
CPLevel1[1:0]
CPLevel2[1:0]
CPLevel3[1:0]
CPLevel4[1:0]
BsDelayVal[3:0]
CPCtrl
CPVal[1:0]
Register
Register
Register
(Hex)
(Hex)
(Hex)
12
14
POR
POR
POR
80
00
Automatic Charge Pump Level 1 Select.
Charge pump level 1 is selected by the automatic tuning system when the VCO tuning voltage is greater than 2.0 V.
Automatic Charge Pump Level 2 Select.
Charge pump level 2 is selected by the automatic tuning system when the VCO tuning voltage is between 1.5 V and
Automatic Charge Pump Level 3 Select.
Charge pump level 3 is selected by the automatic tuning system when the VCO tuning voltage is between 1.0 V and
Automatic Charge Pump Level 4 Select.
Charge pump level 4 is selected by the automatic tuning system when the VCO tuning voltage is lower than 1.0 V.
For each of the above register fields, the analog charge pump levels are set as follows:
00b = 0.5 mA.
01b = 1.0 mA.
10b = 1.5 mA.
11b = 2.0 mA.
VCO Tuning System Delay.
VCO tuning system delay in reference clock cycles between the time tuning system is enabled and tuning starts. The
T
R is the reference divider value selected by register bit PLLRefDiv (0x02[1]).
Charge Pump Control.
0 = Analog charge pump turns OFF when the digital charge pump turns ON (when register bit TUNLD (0x10[1]) is
1 = Analog charge pump always ON. Use this setting for normal operation.
Analog Charge Pump Level.
This is the value selected by the automatic tuning system, as specified in register 0x11. The values correspond to the
00b = 0.5 mA.
01b = 1.0 mA.
10b = 1.5 mA.
11b = 2.0 mA.
For normal operation, set to 11b.
2.0 V.
For normal operation, set to 11b.
1.5 V.
For normal operation, set to 10b.
For normal operation, set to 00b.
default is 8 counts and can be set between 0 and 15 counts of reference cycle. The reference cycle period is:
For normal operation, set to 0x8.
low).
following charge pump levels. Read only.
D7
D7
REF
D7
TUNAutoEn[1:0]
= R/Reference oscillator frequency
D6
D6
D6
BsDelayVal[3:0]
Rev. 02 — 8 September 2009
D5
D5
D5
Chapter 3: Serial Programming Interface and Registers
D4
D4
D4
Reserved
D3
D3
D3
TUN1[5:0]
CPCtrl
D2
D2
D2
D1
D1
D1
CX24118A
CPVal[1:0]
© NXP B.V. 2009. All rights reserved.
D0
D0
D0
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