wm8593seft-v Wolfson Microelectronics plc, wm8593seft-v Datasheet - Page 57

• Manufacturer Part Number: wm8593seft-v
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics plc

Production Data
JACK DETECT
w
When using the WM8593 with headphones, a jack detect function is available using the GPIO pins.
The jack detect function is controlled using GPIO1_APP and GPIO2_APP. The polarity of the jack
detect signal can be inverted using JD_INV. When a jack is detected, the WM8593 will automatically
mute
JD_PGA2R_MUTE, JD_PGA3L_MUTE and JD_PGA3R_MUTE.
See Application Information section for details of connections to the headphone jack.
Example: Mute speakers when headphone is inserted
Assume PGA1L is connected to VOUT1L, PGA1R is connected to VOUT1R and so on. VOUT1L
and VOUT1R are used to drive the speaker amplifier, and VOUT3L and VOUT3R are used to drive
headphones directly.
JD_PGA1L_MUTE=1 and JD_PGA1R_MUTE=1 to mute PGA1L and PGA1R when a set of
headphones is inserted.
Table 44 Jack Detect Control
PGA_CTRL2
REGISTER
ADDRESS
GEN
R27
1Bh
R26
1Ah
PGAs
as
BIT
10
11
12
8
9
0
1
2
7
defined
Set GPIO1_APP=1 to enable jack detect on GPIO1, then set
PGA1R_
PGA2R_
PGA3R_
PGA2L_
PGA3L_
PGA1L_
GPIO1_
GPIO2_
JD_INV
LABEL
MUTE
MUTE
MUTE
MUTE
MUTE
MUTE
APP
APP
JD_
JD_
JD_
JD_
JD_
JD_
by
JD_PGA1L_MUTE,
DEFAULT
0
0
0
0
0
0
0
0
0
GPIO1 Application Select
0 = Use GPIO1 as data pin for audio
interface mux
1 = Use GPIO1 as input for jack detect
GPIO2 Application Select
0 = Use GPIO2 as data pin for audio
interface mux
1 = Use GPIO2 as input for jack detect
Jack Detect Polarity
0 = Normal (active high)
1 = Inverted (active low)
Jack Detect Mute Control
0 = Do not mute PGA when jack is detected
1 = Mute PGA when jack is detected
JD_PGA1R_MUTE,
DESCRIPTION
PD Rev 4.0 April 2008
JD_PGA2L_MUTE,
WM8593
57