AD9520-2SLASHPCBZ datasheet(79/84 Pages) AD

79 / 84 page

AD9520-2

Rev. 0 | Page 79 of 84

Reg.

Addr

(Hex) Bit(s) Name

Description

19B

[1]

Channel 3 direct-to-output

Connects OUT9, OUT10, and OUT11 to Divider 3 or directly to VCO or CLK.

[1] = 0; OUT9, OUT10, and OUT11 are connected to Divider 3 (default).

[1] = 1:

If 0x1E1[1:0] = 10b, the VCO is routed directly to OUT9, OUT10, and OUT11.

If 0x1E1[1:0] = 00b, the CLK is routed directly to OUT9, OUT10, and OUT11.

If 0x1E1[1:0] = 01b, there is no effect.

19B

[0]

Disable Divider 3 DCC

Duty-cycle correction function.

[0] = 0; enable duty-cycle correction (default).

[0] = 1; disable duty-cycle correction.

Table 56. VCO Divider and CLK Input

Reg.

Addr

(Hex) Bit(s) Name

Description

1E0

[2:0]

VCO divider

[2]

[1]

[0]

Divide

2 (default)

Output static

1 (bypass)

Output static

1E1

[4]

Power-down clock input section

Powers down the clock input section (including CLK buffer, VCO divider, and CLK tree).

[4] = 0; normal operation (default).

[4] = 1; power down.

1E1

[3]

Power-down VCO clock interface Powers down the interface block between VCO and clock distribution.

[3] = 0; normal operation (default).

[3] = 1; power down.

1E1

[2]

Power-down VCO and CLK

Powers down both the CLK input and the VCO.

[2] = 0; normal operation (default).

[2] = 1; power down.

1E1

[1]

Select VCO or CLK

Selects either the VCO or the CLK as the input to VCO divider.

[1] = 0; select external CLK as input to VCO divider (default).

[1] = 1; select VCO as input to VCO divider; cannot bypass VCO divider when this is

selected. This bit must be set to use the PLL with the internal VCO.

1E1

[0]

Bypass VCO divider

Bypasses or uses the VCO divider.

[0] = 0; use VCO divider (default).

[0] = 1; bypass VCO divider; cannot select VCO as input when this is selected.

AD9520-2/PCBZ 数据表(PDF) 79 Page - Analog Devices

AD9520-2/PCBZ 数据表(HTML) 79 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84

数据表下载