ZHCSGH3A March 2016 – July 2017 TAS5782M
PRODUCTION DATA.
The classic example here is running a 96-kHz sampling system. Given the clock tree for the device (shown in Figure 65), a non-audio clock rate cannot be brought into the MCLK to the PLL in master mode. Therefore, the PLL source must be configured to be a GPIO pin, and the output brought back into another GPIO pin.
The clock flow through the system is shown in Figure 67. The newly generated MCLK must be brought out of the device on a GPIO pin, then brought into the MCLK pin for integer division to create SCLK and LRCK/FS outputs.
NOTE
Pull-up resistors should be used on SCLK and LRCK/FS in master mode to ensure the device remains out of sleep mode.