WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 105

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

w
Production Data
These registers are described in Table 58 below.
Table 58 Audio Interface Output Function Control
OPERATION WITH TDM
Time division multiplexing (TDM) allows multiple devices to transfer data simultaneously on the same
bus. The WM8990 ADCs and DACs support TDM in master and slave modes, on both interfaces,
and for all data formats and word lengths. TDM is enabled using register bits AIFADC_TDM and
AIFDAC_TDM. The TDM data slot is programmed using register bits AIFADC_TDM_CHAN and
AIFDAC_TDM_CHAN.
Figure 63 TDM with WM8990 as Master
R8 (08h)
R9 (09h)
REGISTER
ADDRESS
15
14
13
11
15
11
BIT
AIF_MSTR1
AIF_MSTR2
AIF_SEL
ADCLRC_DIR
ALRCGPIO1
DACLRC_DIR
LABEL
0b
0b
0b
0b
0b
0b
DEFAULT
Figure 64 TDM with Other CODEC as Master
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)
ADCLRC Direction
(Forces ADCLRC clock to be output in
slave mode)
0 = ADCLRC normal operation
1 = ADCLRC clock output enabled
ADCLRC/GPIO1 Pin Function Select
0 = ADCLRC pin
1 = GPIO1 pin (ADCLRC connected to
DACLRC internally)
DACLRC Direction
(Forces DACLRC clock to be output in
slave mode)
0 = DACLRC normal operation
1 = DACLRC clock output enabled
Audio Interface Select
DESCRIPTION
PD, March 2009, Rev 4.0
WM8990
105