WM8959 Wolfson Microelectronics Ltd., WM8959 Datasheet - Page 93
WM8959
Manufacturer Part Number
WM8959
Description
Mobile Multimedia DAC with Dual-mode Class AB/D Speaker Driver
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet
1.WM8959.pdf
(155 pages)
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These registers are described in Table 50 below.
Table 50 Audio Interface Output Function Control
OPERATION WITH TDM
Time division multiplexing (TDM) allows multiple devices to transfer data simultaneously on the same
bus. The WM8959 DACs support TDM in master and slave modes, on both interfaces, and for all
data formats and word lengths. TDM is enabled using register bit AIFDAC_TDM. The TDM data slot
is programmed using register bit AIFDAC_TDM_CHAN.
Figure 60 TDM with WM8959 as Master
R8 (08h)
R9 (09h)
REGISTER
ADDRESS
15
14
13
11
BIT
AIF_MSTR1
AIF_MSTR2
AIF_SEL
DACLRC_DIR
LABEL
0b
0b
0b
0b
DEFAULT
Figure 61 TDM with Other DAC as Master
WM8959 or
WM8959
Similar
DAC
Audio Interface 1 Master Mode Select
0 = Slave mode
1 = Master mode
Audio Interface 2 Master Mode Select
0 = Slave mode
1 = Master mode
0 = Audio interface 1
1 = Audio interface 2 (GPIO3/BCLK2,
GPIO4/DACLRC2, GPIO5/DACDAT2)
DACLRC Direction
(Forces DACLRC clock to be output in
slave mode)
0 = DACLRC normal operation
1 = DACLRC clock output enabled
Audio Interface Select
DACLRC
DACDAT
BCLK
DACLRC
DACDAT
BCLK
DESCRIPTION
PP, May 2008, Rev 3.1
WM8959
Processor
93
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