STW81102ATR STMicroelectronics, STW81102ATR Datasheet - Page 33

• 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

STW81102
Table 18.
B_COUNTER
B[10:3]. B counter value (bit B11 in the previous register, bits B[2:0] in the next register)
A_COUNTER
Bits B[2:0] for B_COUNTER, A_COUNTER values.
REF_DIVIDER
Reference clock divider ratio R[9:1] (bits R1, R0 in the next register).
CONTROL
The CONTROL register is used to set the charge pump current, the VCO output voltage
amplitude and the prescaler modulus:
PLL_A[1:0]:
CPSEL[2:0]:
PSC_SEL:
MSB
MSB
MSB
MSB
B10
R9
R1
b7
b7
B2
b7
b7
Decimal value
8
9
Functional modes (continued)
VCO amplitude
charge pump output current
prescaler modulus select ('0' for P=16, '1' for P=19)
R0
B9
B1
R8
b6
b6
b6
b6
Enable VCO B, direct output
Enable external VCO, direct output
PLL_A1
B8
B0
R7
b5
b5
b5
b5
PLL_A0
B7
A4
R6
b4
b4
b4
b4
CPSEL2
b3
B6
A3
R5
b3
b3
b3
Description
CPSEL1
b2
B5
A2
R4
b2
b2
b2
CPSEL0
b1
B4
A1
R3
b1
b1
b1
I
2
C bus interface
PSC_SEL
LSB
LSB
LSB
LSB
B3
A0
R2
b0
b0
b0
b0
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