Si4122 ETC, Si4122 Datasheet - Page 22

• Manufacturer Part Number: Si4122
• Description: DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS FOR WIRELESS COMMUNICATIONS
• Manufacturer: ETC

S i4 13 3
Register 0. Main Configuration Address Field = A[3:0] = 0000
22
Name
Bit
17:14
13:12
11:10
9:6
Bit
5
4
3
2
1
0
D17 D16 D15 D14 D13 D12 D11 D10 D9
0
0
AUXSEL
AUTOPDB
IFDIV
Reserved
Reserved
Reserved
Reserved
AUTOK
RFPWR
0
LPWR
Name
[1:0]
0
[1:0]
P
AUXSEL
[1:0]
Program to zero.
Auxiliary Output Pin Definition.
00 = Reserved.
01 = Force output low.
10 = Reserved.
11 = Lock Detect—LDETB.
IF Output Divider.
00 = IFOUT = IFVCO Frequency
01 = IFOUT = IFVCO Frequency/2
10 = IFOUT = IFVCO Frequency/4
11 = IFOUT = IFVCO Frequency/8
Program to zero.
Output Power-Level Settings for IF Synthesizer Circuit.
0 = R
1 = R
Program to zero.
Auto Power Down.
0 = Software powerdown is controlled by Register 2.
1 = Equivalent to setting all bits in Register 2 = 1.
Auto K
0 = K
1 = K
Program to zero. (Used for extended frequency operation. See AN41 for
more information.)
Program to zero.
P
P
LOAD
LOAD
s are controlled by Register 1.
s are set according to Table 9 on page 18.
IFDIV
P
[1:0]
Setting.
Rev. 1.1
500 —normal power mode.
500 —low power mode.
0
D8
0
D7
0
Function
D6
0
LPWR
D5
D4
0
AUTO
PDB
D3
AUTO
D2
K
P
PWR
D1
RF
D0
0