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AD9531

Data Sheet

Address

Bits

Bit Name

Description

[D2:D1]

Polarity [1:0]

Configure OUT2_4x polarity as follows (applies to CMOS only):

00: OUT2_4P normal, OUT2_4N inverted.

01: OUT2_4P normal, OUT2_4N normal.

10: OUT2_4P inverted, OUT2_4N inverted.

11: OUT2_4P inverted, OUT2_4N normal.

Power-down

0: OUT2_4x driver active.

1: OUT2_4x driver powered down.

Registers for PLL2 Group 2C Outputs, OUT2_5x to OUT2_7x—Register 0x020C to Register 0x020F

Table 66. PLL2 Group 2C Outputs Register Details

Address

Bits

Bit Name

Description

0x020C

[D7:D0]

D2C [7:0]

D2C divider Bit D7 (MSB) to Bit D0 (LSB). The divide factor is the value of D2C [7:0] + 1. D2C powers

down when all four of the associated output drivers power down, whether via the power-down bit

or via the logic mode bits.

0x020D

[D7:D6]

Unused

Unused.

[D5:D3]

Logic mode [2:0]

Configure the OUT2_5x output driver as follows:

000: disabled.

001: HSTL.

010: undefined.

011: undefined.

100: 1.8 V CMOS, OUT2_5P active, OUT2_5N active.

101: 1.8 V CMOS, OUT2_5P active, OUT2_5N disabled.

110: 1.8 V CMOS, OUT2_5P disabled, OUT2_5N active.

111: undefined.

[D2:D1]

Polarity [1:0]

Configure OUT2_5x polarity as follows (applies to CMOS only):

00: OUT2_5P normal, OUT2_5N inverted.

01: OUT2_5P normal, OUT2_5N normal.

10: OUT2_5P inverted, OUT2_5N inverted.

11: OUT2_5P inverted, OUT2_5N normal.

Power-down

0: OUT2_5x driver active.

1: OUT2_5x driver powered down.

0x020E

[D7:D6]

Unused

Unused.

[D5:D3]

Logic mode [2:0]

Configure the OUT2_6x output driver as follows:

000: disabled.

001: HSTL.

010: undefined.

011: undefined.

100: 1.8 V CMOS, OUT2_6P active, OUT2_6N active.

101: 1.8 V CMOS, OUT2_6P active, OUT2_6N disabled.

110: 1.8 V CMOS, OUT2_6P disabled, OUT2_6N active.

111: undefined.

[D2:D1]

Polarity [1:0]

Configure OUT2_6x polarity as follows (applies to CMOS only):

00: OUT2_6P normal, OUT2_6N inverted.

01: OUT2_6P normal, OUT2_6N normal.

10: OUT2_6P inverted, OUT2_6N inverted.

11: OUT2_6P inverted, OUT2_6N normal.

Power-down

0: OUT2_6x driver active.

1: OUT2_6x driver powered down.

Rev. 0 | Page 72 of 88

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