Various external
clock inputs are needed to drive the device. Summary of these input
clock signals is as follows:
- High frequency
oscillators
- MCU_OSC0_XO/MCU_OSC0_XI — external main crystal
interface pins of the internal oscillator which
sources a reference clock. Provides reference
clock to PLLs within MCU and MAIN domain.
- Low frequency
oscillators
- LSOSC0_IN/LFOSC0_OUT - external 32.768KHz crystal
interface pins of the internal oscillator which
sources a reference clock. Provides reference
clock to RTC and Timers within MCU and MAIN
domain.
- General purpose
clock inputs
- MCU_EXT_REFCLK0 — optional external system clock
input (MCU domain).
- EXT_REFCLK1— optional external system clock input
(MAIN domain).
- External CPTS
reference clock inputs
- CP_GEMAC_CPTS0_RFT_CLK — CPTS reference clock
input for CPSW and Timers in MAIN.
- External audio reference clock inputs/outputs
- AUDIO_EXT_REFCLK[1:0] — optional McASP
high-frequency input clocks when configured to
operate as an input.
Note: Other clock
inputs that are routed directly to the subsystems are
described in the respective subsystem
chapters.