WM8941GEFL/RV Wolfson Microelectronics, WM8941GEFL/RV Datasheet - Page 69

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WM8941GEFL/RV

Manufacturer Part Number
WM8941GEFL/RV
Description
Audio CODECs Mono CODEC
Manufacturer
Wolfson Microelectronics
Datasheets

Specifications of WM8941GEFL/RV

Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-28
Minimum Operating Temperature
- 25 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Pre Production
w
Figure 41 Example Usage of MODE Pin to Generate a Clock Out in 3-wire Mode
Table 56 Control Interface
This example shows how the MODE_GPIO register bit interfaces to the MODE pad in the case there
MODE is used as a GPIO output. When MODE_GPIO is set, the internal version of MODE is
overridden to high and the MODE pin output driver is enabled. The pull up, which is used to default
3-wire mode at start-up, is disabled as a power saving measure. MODE_GPIO cannot be set in 2-
wire mode - this would prevent correct operation of the control interface. Internal timing is arranged
to ensure that the override is in place before the pull-up is disabled.
Table 55 Mode is GPIO Control
Auto-incremental writes are supported in 2 wire and 3 wire modes. This is enabled by default.
R8
GPIO
Control
R9
Control
Interface
REGISTER
REGISTER
ADDRESS
ADDRESS
7
1
BIT
BIT
MODE_GPIO
AUTOINC
LABEL
LABEL
0
1
DEFAULT
DEFAULT
Selects MODE pin as a GPIO pin
0 = MODE is an input. MODE selects 2-
wire mode when low and 3-wire mode
when high.
1 = MODE can be an input or output
under the control of the GPIO control
register. Interface operates in 3-wire
mode regardless of what happens on the
MODE pin.
Auto-Incremental write enable
0=Auto-Incremental writes disabled
1=Auto-Incremental writes enabled
PP, Rev 3.3, December 2007
DESCRIPTION
DESCRIPTION
WM8941
69

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