WM8940GEFL/V Wolfson Microelectronics, WM8940GEFL/V Datasheet - Page 60

Audio CODECs Mono CODEC with Speaker Driver

WM8940GEFL/V

Manufacturer Part Number
WM8940GEFL/V
Description
Audio CODECs Mono CODEC with Speaker Driver
Manufacturer
Wolfson Microelectronics
Datasheet

Specifications of WM8940GEFL/V

Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-24
Minimum Operating Temperature
- 25 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
WM8940
w
GENERAL PURPOSE INPUT/OUTPUT
Figure 32 A-Law Companding
In 2-wire mode, the CSB pin is not required and it can be used as a GPIO pin. In 3 wire mode,
the MODE / GPIO can be configured as a GPIO by setting the MODE_GPIO register bit
Whichever pin is used for GPIO, it is controlled from the GPIO control register R8. The GPIOSEL bits
allow the chosen pin to be configured to perform a variety of useful tasks as shown in Table 57.
Note that SLOWCLKEN must be enabled when using the jack detect function.
Table 52 CSB/GPIO Control
R8
GPIO
control
REGISTER
ADDRESS
120
100
80
60
40
20
0
0
5:4
3
2:0
BIT
0.2
OPCLKDIV
GPIOPOL
GPIOSEL
LABEL
A-law Companding
0.4
Normalised Input
00
0
000
DEFAULT
0.6
PLL Output clock division ratio
00=divide by 1
01=divide by 2
10=divide by 3
11=divide by 4
GPIO Polarity invert
0=Non inverted
1=Inverted
CSB/GPIO pin function select:
000=CSB input
001= Jack insert detect
010=Temp ok
011=Amute active
100=SYSCLK clock o/p
101=PLL lock
110=Reserved
111=Reserved
0.8
DESCRIPTION
PD, Rev 4.2, April 2008
1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Production Data
60

Related parts for WM8940GEFL/V