STW81102ATR STMicroelectronics, STW81102ATR Datasheet - Page 32

• Manufacturer Part Number: STW81102ATR
• Description: IC SYNTHESIZER MULTI RF 28VFQFPN
• Manufacturer: STMicroelectronics
• Type: Frequency Synthesizerr

Specifications of STW81102ATR

• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Number Of Circuits: 1
• Ratio - Input:output: 3:2
• Differential - Input:output: No/No
• Frequency - Max: 4.65GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN, 28-VFQFPN
• Frequency-max: 4.65GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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6.3
6.3.1
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2
C bus interface
I
The STW81102 has 6 write-only registers and 1 read-only register.
Write-only registers
Table 17
Table 17.
FUNCTIONAL_MODE
OUTBUF_CTRL_EN:
CAL_AUTOSTART_EN:
The bits PD[4:0] allow to select different functional modes for the STW81102 synthesizer
according to the
Table 18.
2
OUTBUF_
CTRL_EN
C registers
MSB
b7
Decimal value
HEX code
gives a short description of the write-only registers.
0x00
0x01
0x02
0x03
0x04
0x05
0
1
2
3
4
5
6
7
CAL_AUT
OSTART_
Write-only registers
Functional modes
EN
b6
Table 18 .
Power down mode
Enable VCO A, output frequency divided by 2
Enable VCO B, output frequency divided by 2
Enable external VCO, output frequency divided by 2
Enable VCO A, output frequency divided by 4
Enable VCO B, output frequency divided by 4
Enable external VCO, output frequency divided by 4
Enable VCO A, direct output
PD4
Output Buffer control mode enable (0 = Off; 1 = ON)
VCO calibration auto-restart enable (0 = Off; 1 = ON)
b5
DEC code
0
1
2
3
4
5
PD3
b4
FUNCTIONAL_MODE
B_COUNTER
A_COUNTER
REF_DIVIDER
CALIBRATION
CONTROL
PD2
b3
Description
PD1
b2
Description
PD0
b1
STW81102
LSB
B11
b0