SLOSE66 november 2020 TAS6424MS-Q1
PRODUCTION DATA
After performing the phase reference measurements, measure the phase of the speaker load. This is performed in the same manner as the reference measurements, except the loopback is disabled in bit 7 register 0x16. Previously, the phase reference is measured on channel 1 and channel 3. In this test stage all four channels are measured. Measure the channels sequentially as they cannot be measured at the same time.
For loopback delay detection, use the following test procedure for either BTL mode or PBTL mode:
When the test is complete, the channel reporting register indicates the status change from the AC diagnostic mode to the Hi-Z state. The detected impedance is stored in the appropriate I2C register.
The AC phase in degrees is calculated with the AC Phase Calculation equation:
Where: