AFE032 datasheet(41/77 Pages) TI1

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AFE032

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SBOS669A – AUGUST 2013 – REVISED DECEMBER 2013

Table 17. REG_DAC/HPF/LPF/PA_CTRL Register (Address = 03h)

Filter bias

PA output

LPF enable

HPF enable

PA enable

DAC enable

Reserved

Disable TLIM

enable

R/W

LEGEND: R/W = read and write.

Bit 7

LPF enable

This bit enables and disables the programmable analog low-pass filter (LPF).

0 = LPF disabled (default)

1 = LPF enabled

Bit 6

HPF enable

This bit enables and disables the programmable analog high-pass filter (HPF).

0 = HPF disabled (default)

1 = HPF enabled

Bit 5

Filter bias enable

This bit enables and disables the programmable LPF and HPF. For normal Rx or Tx operation, this bit remains

enabled. For power-down operation, this bit is disabled by placing the analog filters in low-power mode with high

output impedance.

0 = Disabled (default)

1 = Enable filter bias

Bit 4

PA enable

This bit enables and disables the internal sub-regulation circuitry of the power amplifier.

0 = Disabled (default)

1 = PA enabled

Bit 3

PA output enable

This bit enables the PA output stage. When enabled, the PA output stage functions normally with a low output

impedance capable of driving heavy loads. When disabled, the PA output stage is placed in a high-impedance

state.

0 = Disabled (default)

1 = PA output enabled

Bit 2

DAC enable

This bit enables and disables the DAC.

0 = DAC disabled (default)

1 = DAC enabled

Bit 1

Reserved

This bit is reserved.

Default = 0

Bit 0

Disable TLIM

This bit enables and disables the PA thermal shutdown circuitry. Warning: keeping the PA thermal shutdown

circuitry enabled to prevent potential permanent damage to the device is strongly recommended. See the Thermal

Overload section for more details.

0 = PA TLIM enabled (default)

1 = PA TLIM disabled

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