wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 107
wm8918
Manufacturer Part Number
wm8918
Description
Ultra Low Power Dac For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8918.pdf
(175 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
wm8918CGEFL/RV
Manufacturer:
WOLFSON
Quantity:
20 000
Part Number:
wm8918GEFL
Manufacturer:
WOLFSON
Quantity:
20 000
Company:
Part Number:
wm8918GEFL/RV
Manufacturer:
MOLEX
Quantity:
12 000
- Current page: 107 of 175
- Download datasheet (2Mb)
Production Data
w
BCLK/GPIO4
The BCLK/GPIO4 pin is configured using the register bits described in Table 71. By default, this pin
provides the BCLK function associated with the Digital Audio Interface. The BCLK function can
operate in slave mode (BCLK input) or in master mode (BCLK output), depending on the BCLK_DIR
register bit as described in the “Digital Audio Interface” section.
It is possible to configure the BCLK/GPIO4 pin to provide various GPIO functions; in this case, the
BCLK function is provided using the MCLK pin. Note that the BCLK function is always in slave mode
(BCLK input) in this mode.
To select the GPIO4 functions, it is required to set BCLK_DIR = 0 (see Table 52) and to set
GPIO_BCLK_MODE_ENA = 1 (see Table 71 below). In this configuration, the MCLK input is used as
the bit-clock (BCLK) for the Digital Audio Interface.
When the BCLK/GPIO4 pin is configured as GPIO4, then the pin function is determined by the
GPIO_BCLK_SEL register field.
Table 71 BCLK/GPIO4 Control
R124 (7Ch)
GPIO
Control 4
REGISTER
ADDRESS
BIT
3:0
7
GPIO_BCLK_MODE_
GPIO_BCLK_SEL
LABEL
ENA
[3:0]
DEFAULT
0000
0
GPIO_BCLK function select:
0000 = Input Pin (default)
0001 = Clock output
(f=SYSCLK/OPCLKDIV)
0010 = Logic '0'
0011 = Logic '1'
0100 = IRQ
0101 = FLL Lock
0110 = Mic Detect
0111 = Mic Short
1000 = DMIC clock out
1001 = FLL Clock Output
1010 to 1111 = Reserved
Selects BCLK/GPIO4 pin function
0 = BCLK/GPIO4 is used as BCLK
1 = BCLK/GPIO4 is used as GPIO.
MCLK provides the BCLK in the AIF
in this mode.
PD, Rev 4.0, September 2010
DESCRIPTION
WM8918
107
Related parts for wm8918
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
24-bit, 192khz 6-channel Dac With Volume Control
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
24-bit, 192khz 6-channel Dac
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
HI FI AND TELEPHONY DUAL CODEC
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Stereo Codec Portable Audio Applications
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Stereo Codec For Portable Audio Applications
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Multichannel Codec With S/pdif Transceiver
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Ac97 Audio Codec Mixer With Integrated Headphone Driver
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
Part Number:
Description:
Ac-link Interface Audio Dac
Manufacturer:
Wolfson Microelectronics plc
Datasheet: