WM8940GEFL/V Wolfson Microelectronics, WM8940GEFL/V Datasheet - Page 54

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

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
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Table 43 Audio Interface Control
Note: Right Justified Mode will only operate with a maximum of 24 bits. If 32-bit mode is selected the
device will operate in 24-bit mode.
Table 44 Clock Control
R5
Companding
Control
R6
Clock
generation
control
REGISTER
REGISTER
ADDRESS
ADDRESS
2
1
5
8
7:5
4:2
0
BIT
BIT
DLRSWAP
ALRSWAP
WL8
CLKSEL
MCLKDIV
BCLKDIV
MS
LABEL
LABEL
0
0
0
1
010
000
0
DEFAULT
DEFAULT
Controls whether DAC data appears in
‘right’ or ‘left’ phases of FRAME clock:
0=DAC data appear in ‘left’ phase of
FRAME
1=DAC data appears in ‘right’ phase of
FRAME
Controls whether ADC data appears in
‘right’ or ‘left’ phases of FRAME clock:
0=ADC data appear in ‘left’ phase of
FRAME
1=ADC data appears in ‘right’ phase of
FRAME
8 Bit Word Length Enable
Only recommended for use with
companding
0=Word Length controlled by WL
1=8 bits
Controls the source of the clock for all
internal operation:
0=MCLK
1=PLL output
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
Configures the BCLK and FRAME output
frequency, for use when the chip is
master over BCLK.
000=divide by 1 (BCLK=MCLK)
001=divide by 2 (BCLK=MCLK/2)
010=divide by 4
011=divide by 8
100=divide by 16
101=divide by 32
110=reserved
111=reserved
Sets the chip to be master over FRAME
and BCLK
0=BCLK and FRAME clock are inputs
1=BCLK and FRAME clock are outputs
generated by the WM8940 (MASTER)
DESCRIPTION
DESCRIPTION
PD, Rev 4.2, April 2008
Production Data
54