DA7219 datasheet(44/123 Pages) DIALOG

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DA7219

Audio codec with Advanced Accessory Detect

Company confidential

Datasheet

Revision 2.1

17-Dec -2015

44 of 123

9.5.2

Detection of jack insertion or removal

Whenever a jack is inserted, a jack insertion event is flagged by e_jack_inserted getting set to1.

Similarly, a jack removal event is flagged by e_jack_removed getting set to1.

The presence or absence of a jack is recorded in jack_insertion_sts.

Any jack insertion will be detected, and is recorded by the setting of jack_insertion_sts. The register

field jack_insertion_sts = 1 if a jack has been inserted, and jack_insertion_sts = 0 if no jack has been

inserted.

Jack detection latency, that is, the time from an e_jack_insertion event to the point where

e_jack_detect_complete is asserted, is configurable using jack_detect_rate. The jack detection

latency times are different for three-pole and four-pole jacks, and are listed in

Table 22: Jack detection latency timings controlled by jack_detect_rate

jack_detect_rate

value

Three-pole jacks

(ms)

Four-pole jacks

(ms)

128

256

512

Debouncing is avaliable on jack insertion and removal events. Debounce on jack insertion is

specified using jackdet_debounce, and on jack removal using jackdet_rem_deb. The debounce times

are listed in Table 31 and Table 32.

Table 31: Debounce settings for jack insertion events

jackdet_debounce

Debounce time (ms)

000

001

010

20 (default)

011

100

101

200

110

500

111

Table 32: Debounce settings for jack removal events

jackdet_rem_deb

Debounce time (ms)

1 (default)

The jack insertion, jack removal, and jack complete interrupts can be masked using the register fields

in the ACCDET_IRQ_MASK_A register. The jack insertion interrupt is masked by setting

m_jack_inserted = 1, the jack removal interrupt is masked by setting m_jack_removed = 1, and the

jack detection complete interrupt is masked by setting m_jack_detect_complete = 1. These masking

fields mask the interrupt signals, but do not prevent updating of the event fields or the status fields

previously described.

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