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Data Sheet

AD9531

Registers for PLL1 Group 1A Outputs, OUT1_0x to OUT1_3x—Register 0x0110 to Register 0x0114

Table 59. PLL1 Group 1A Outputs Register Details

Address

Bits

Bit Name

Description

0x0110

[D7:D0]

D1A [7:0]

D1A divider Bit D7 (MSB) to Bit D0 (LSB). The divide factor is the value of D1A [7:0] + 1. D1A powers

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

or via the logic mode bits.

0x0111

[D7:D6]

Unused

Unused.

[D5:D3]

Logic mode [2:0]

These bits configure the OUT1_0x output driver as follows:

000: disabled.

001: HSTL.

010: undefined.

011: undefined.

100: 1.8 V CMOS, OUT1_0P active, OUT1_0N active.

101: 1.8 V CMOS, OUT1_0P active, OUT1_0N disabled.

110: 1.8 V CMOS, OUT1_0P disabled, OUT1_0N active.

111: undefined.

[D2:D1]

Polarity [1:0]

Configure OUT1_0x polarity as follows (applies to CMOS only):

00: OUT1_0P normal, OUT1_0N inverted.

01: OUT1_0P normal, OUT1_0N normal.

10: OUT1_0P inverted, OUT1_0N inverted.

11: OUT1_0P inverted, OUT1_0N normal.

Power-down

0: OUT1_0x driver active.

1: OUT1_0x driver powered down.

0x0112

[D7:D6]

Unused

Unused.

[D5:D3]

Logic mode [2:0]

Configure the OUT1_1x output driver as follows:

000: disabled.

001: HSTL.

010: undefined.

011: undefined.

100: 1.8 V CMOS, OUT1_1P active, OUT1_1N active.

101: 1.8 V CMOS, OUT1_1P active, OUT1_1N disabled.

110: 1.8 V CMOS, OUT1_1P disabled, OUT1_1N active.

111: undefined.

[D2:D1]

Polarity [1:0]

Configure OUT1_1x polarity as follows (applies to CMOS only):

00: OUT1_1P normal, OUT1_1N inverted.

01: OUT1_1P normal, OUT1_1N normal.

10: OUT1_1P inverted, OUT1_1N inverted.

11: OUT1_1P inverted, OUT1_1N normal.

Power-down

0: OUT1_1x driver active.

1: OUT1_1x driver powered down.

0x0113

[D7:D6]

Unused

Unused.

[D5:D3]

Logic mode [2:0]

Configure the OUT1_2x output driver as follows:

000: disabled.

001: HSTL.

010: undefined.

011: undefined.

100: 1.8 V CMOS, OUT1_2P active, OUT1_2N active.

101: 1.8 V CMOS, OUT1_2P active, OUT1_2N disabled.

110: 1.8 V CMOS, OUT1_2P disabled, OUT1_2N active.

111: undefined.

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