STW81103 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STW81103

Multi-band RF frequency synthesizer with integrated VCOs

STMicroelectronics 

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STW81103

SPI digital interface

Table 23. Bits at 01h and ST2

Serial interface address = 01h Register name = ST2

Bit

Name

Description

[23]

OUTBUF_CTRL_EN Output buffer control mode enable (0 = Off, 1 = On)

[22]

CAL_AUTOSTART_EN VCO calibration auto restart enable (0 = Off, 1 = On)

[21]

PD4

Device functional modes:

0. Power down

[20]

PD3

1. Enable VCO A, output frequency divided by 2

[19]

PD2

2. Enable VCO B, output frequency divided by 2

3. Enable external VCO, output frequency divided by 2

[18]

PD1

4. Enable VCO A, output frequency divided by 4

5. Enable VCO B, output frequency divided by 4

6. Enable external VCO, output frequency divided by 4

[17]

PD0

7. Enable VCO A, direct output

8. Enable VCO B, direct output

9. Enable external VCO, direct output

[16]

B11

[15]

B10

[14]

B9

[13]

B8

[12]

B7

[11]

B6

B_COUNTER bits

[10]

B5

[9]

B4

[8]

B3

[7]

B2

[6]

B1

[5]

B0

[4]

A4

[3]

A3

[2]

A2

A_COUNTER bits

[1]

A1

[0]

A0

39/53

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