DA7218 datasheet(57/154 Pages) RENESAS

57 / 154 page

Ultra-Low Power Stereo Codec

R32DS0004EE0370 Revision 3.7

Aug 9, 2024

CFR0011-120-00

Page 57

Gain updates can be ramped through all intermediate values by setting hp_l_amp_ramp_en = 1. This ramp

setting overrides the settings of hp_l_amp_zc_en. To prevent zipper noise when gain ramping is selected, the

gain is ramped through additional subrange gain steps.

Alternatively, gain updates can be synchronized with signal zero-crossings by setting hp_l_amp_zc_en = 1. If no

zero-crossing is detected within the timeout period, then the gain update is applied unconditionally. The timeout

period is approximately 0.1 s, and is not user configurable.

The amplifier can be muted by setting hp_l_amp_mute_en = 1.

The amplifier can be put in its minimum gain configuration by setting hp_l_amp_min_gain_en = 1. If either zero-

crossing or ramping are enabled when minimum gain is set, the ramping or the zero crossing will be performed

while activating the minimum gain. The right-channel headphone amplifier (HP_R_CTRL) is controlled in the

same manner.

Table 42: hp_l_amp_gain and hp_r_amp_gain settings

hp_l_amp_gain

and

hp_r_amp_gain

Gain (dB)

hp_l_amp_gain

and

hp_r_amp_gain

Gain (dB)

hp_l_amp_gain

and

hp_r_amp_gain

Gain (dB)

000000

010100

Reserved

010101

-57.0

101011

-24.0

010110

-55.5

101100

-22.5

010111

-54.0

101101

-21.0

011000

-52.5

101110

-19.5

011001

-51.0

101111

-18.0

011010

-49.5

110000

-16.5

011011

-48.0

110001

-15.0

011100

-46.5

110010

-13.5

011101

-45.0

110011

-12.0

011110

-43.5

110100

-10.5

011111

-42.0

110101

-9.0

100000

-40.5

110110

-7.5

100001

-39.0

110111

-6.0

100010

-37.5

111000

-4.5

100011

-36.0

111001

-3.0

100100

-34.5

111010

-1.5

100101

-33.0

111011

0.0

100110

-31.5

111100

1.5

100111

-30.0

111101

3.0

101000

-28.5

111110

4.5

101001

-27.0

111111

6.0

101010

-25.5

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