WM8960_06 Datasheet, PDF (55/88 Pages) Wolfson Microelectronics plc – Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications

Preliminary Technical Data
WM8960
LOOPBACK
Setting the LOOPBACK register bit enables digital loopback. When this bit is set the output data from
the ADC audio interface is fed directly into the DAC data input.
The ADCs and DACs must both use DACLRC when loopback is enabled. This is enabled by setting
register bit ALRCGPIO = 1.
REGISTER
ADDRESS
R9
Audio
Interface
BIT
LABEL
0
LOOPBACK
Table 38 Loopback Control
DEFAULT
DESCRIPTION
0
Digital Loopback Function
0 = No loopback.
1 = Loopback enabled, ADC data output
is fed directly into DAC data input.
CLOCKING AND SAMPLE RATES
Figure 36 Clocking Scheme
Clocks for the ADCs and DACs, the DSP core functions, the digital audio interface and the class D
outputs are all derived from SYSCLK as show in Figure 36.
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PTD, September 2006, Rev 2.0
55