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WM9713 датащи(PDF) 56 Page - Wolfson Microelectronics plc

номер детали WM9713
подробное описание детали  AC 97 AUDIO TOUCHPANEL CODEC
PDF  111 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9713 датащи(HTML) 56 Page - Wolfson Microelectronics plc

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WM9713L
Preliminary Technical Data
1
PTD, March 2004, Rev 2.2
56
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
24h
Output Volume
Mapping (Jack
Insert)
3:2
DCDRVSEL
00
00: Default, AC coupled headphone.
01: OUT4 as mid-rail output buffer.
11: OUT3 as mid-rail output buffer.
Table 41 DC Coupled Headphone Configuration
In summary:
JIEN not set: Outputs work as normal as selected in the Powerdown and Output PGA Mux Select
registers.
JIEN set: On jack insert GPIO1/6/7/8 is pulled low, HPL and HPR are enabled, DCDRVSEL decides
if the headphones are DC or AC coupled and configures OUT3 or OUT4 to suit, EARSPKSEL
decides if MONO, OUT3 or OUT4 need to be tri-stated to ensure no sound out on the ear-speaker
and finally all other outputs are disabled as explained above to prevent pops on re-enabling.
On jack out GPIO1/6/7/8 is pulled high, the outputs work as normal as selected in the Powerdown
and Output PGA Mux Select registers except that HPL Volume is controlled by EARSPKSEL to
ensure correct ear speaker operation.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
24h Output
Volume
Mapping
(Jack
Insert)
4
JIEN
0 (OFF)
Jack Insert Enable – Takes output of GPIO1
logic
5Ah
Additional
Functions
(1)
7:6
JSEL
00
(GPIO1)
GPIO select for jack insert detection:
00: GPIO1
01: GPIO6
10: GPIO7
11: GPIO8
Table 42 Jack Insertion / Auto-Switching (1)



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