AFE8220TPZPQ1 datasheet(35/49 Pages) TI1

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Control Register Assignments

AFE8220-Q1

www.ti.com....................................................................................................................................................... SBAS455A – JANUARY 2009 – REVISED JULY 2009

Table 24. Control Registers

Address: 1

Description: Functional Block Enables

Bits

Range

Action

Parameter Name

1:0

0..3

Enable IFADC converters

ifadc_en(1:0)

0/1

Gain control for IF_ADC0

ifadc_gain0

0/1

Gain control for IF_ADC1

ifadc_gain1

5:4

0..3

Enable DDCs

ddc_en(1:0)

0/1

Synchronize DDC0 and DDC1

ddc_sync

0/1

Enable primary IF data interface

dout_en

0/1

Enable secondary IF data interface

bb_en

10:9

0..3

Enable auxiliary DACs

cdac_en(1:0)

—

Not used

aux_adc_en

0/1

Enable RTC output pins

rtc_oe

0/1

Enable reference clock output pins

refclk_en

Address: 2

Description: Interrupt Output Level Configuration

Bits

Range

Action

Parameter Name

0 = Active high WAKEUP interrupt

0/1

wakeup_sense

1 = Active low WAKEUP interrupt

0 = Active high IRQ0 interrupt

0/1

irq0_sense

1 = Active low IRQ0 interrupt

0 = Active high IRQ1 interrupt

0/1

irq1_sense

1 = Active low IRQ1 interrupt

0 = Active high IRQ2 interrupt

0/1

irq2_sense

1 = Active low IRQ2 interrupt

Address: 3

Description: DDC0 Input Attenuator

Bits

Range

Action

Parameter Name

2:0

0..6

Attenuation setting for DDC0

ddc_atten(2:0)

Address: 4

Description: DDC0 Input Attenuator

Bits

Range

Action

Parameter Name

15:0

0..65535

Delay setting for DDC0 attenuator

ddc0_delay(15:0)

Address: 5

Description: DDC0 NCO Frequency

Bits

Range

Action

Parameter Name

15:0

0..65535

Upper bytes of DDC0 NCO frequency

ddc0_demod_freq(31:16)

Address: 6

Description: DDC0 NCO Frequency

Bits

Range

Action

Parameter Name

15:0

0..65535

Lower bytes of DDC0 NCO frequency

ddc0_demod_freq(15:0)

Address: 7

Description: DDC0 NCO Phase

Bits

Range

Action

Parameter Name

15:0

0..65535

Upper bytes of DDC0 NCO phase

ddc0_demod_phase(31:16)

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