DRA722_17 Datasheet, PDF (174/408 Pages) Texas Instruments – Infotainment Applications Processor

DRA722, DRA724, DRA725, DRA726
SPRS956B – MARCH 2016 – REVISED JANUARY 2017
www.ti.com
6 Clock Specifications
NOTE
For more information, see Power Reset and Clock Management / PRCM Environment /
External Clock Signal and Power Reset / PRCM Functional Description / PRCM Clock
Manager Functional Description section of the Device TRM.
NOTE
Audio Back End (ABE) module is not supported for this family of devices, but “ABE” name is
still present in some clock or DPLL names.
The device operation requires the following clocks:
• The 32 kHz frequency is used for low frequency operation. It supplies the wake-up domain for
operation in lowest power mode. This is an optional clock and will be supplied by on chip divider + mux
(FUNC_32K_CLK) incase it is not available on external pin.
• The system clocks, SYS_CLKIN1(Mandatory) and SYS_CLKIN2(Optional) are the main clock sources
of the device. They supply the reference clock to the DPLLs as well as functional clock to several
modules.
The Device also embeds an internal free-running 32-kHz oscillator that is always active as long as the the
wake-up (WKUP) domain is supplied.
Figure 6-1 shows the external input clock sources and the output clocks to peripherals.
174 Clock Specifications
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