WM8976GEFL/V Wolfson Microelectronics, WM8976GEFL/V Datasheet - Page 70

• Manufacturer Part Number: WM8976GEFL/V
• Description: Audio CODECs Mono ADC Stereo DAC with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8976GEFL/V

• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8976
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Table 55 Clock Control
The CLKSEL bit selects the internal source of the Master clock from the PLL (CLKSEL=1) or from
MCLK (CLKSEL=0). When the internal clock is switched from one source to another using the
CLKSEL bit, the clock originally selected must generate at least one falling edge after CLKSEL has
changed for the switching of clocks to be successful.
EXAMPLE:
If the PLL is the current source of the internal clock (CLKSEL=1) and it is required to switch to the
MCLK, change CLKSEL to select MCLK (CLKSEL=0) and then disable PLL (PLLEN=0).
R6
Clock
Generation
Control
REGISTER
ADDRESS
0
4:2
7:5
8
BIT
MS
BCLKDIV
MCLKDIV
CLKSEL
LABEL
0
000
010
1
DEFAULT
Sets the chip to be master over LRC and
BCLK
0=BCLK and LRC clock are inputs
1=BCLK and LRC clock are outputs
generated by the WM8976 (MASTER)
Configures the BCLK output frequency,
for use when the chip is master over
BCLK.
000=divide by 1 (BCLK=SYSCLK)
001=divide by 2 (BCLK=SYSCLK/2)
010=divide by 4
011=divide by 8
100=divide by 16
101=divide by 32
110=reserved
111=reserved
Sets the scaling for either the MCLK or
PLL clock output (under control of
CLKSEL)
000=divide by 1
001=divide by 1.5
010=divide by 2
011=divide by 3
100=divide by 4
101=divide by 6
110=divide by 8
111=divide by 12
Controls the source of the clock for all
internal operation:
0=MCLK
1=PLL output
DESCRIPTION
PD Rev 4.4 July 2009
Production Data
70