SPRSP35 Data sheet

SPRSP35K February 2019 – April 2024 DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1

PRODUCTION DATA

6.9.4.1 Input and Output Clocks / Oscillators

Various external clock inputs/outputs are needed to drive the device. Summary of these input clock signals is as follows:

OSC1_XO/OSC1_XI — Еxternal main crystal interface pins connected to internal oscillator which sources reference clock and provides reference clock to PLLs within MAIN domain. Also, for audio applications, high-frequency oscillator 0 is used to provide audio clock frequencies to MCASPs.
High frequency oscillators inputs
- OSC1_XO/OSC1_XI — external main crystal interface pins connected to internal oscillator which sources reference clock. Provides reference clock to PLLs within MCU domain and MAIN domain. This high-frequency oscillator is used to provide audio clock frequencies to MCASPs.
- WKUP_OSC0_XO/WKUP_OSC0_XI — external main crystal interface pins connected to internal oscillator which sources reference clock. Provides reference clock to PLLs within WKUP and MAIN domain.
Low frequency oscillator input
- WKUP_LFOSC_XO/WKUP_LFOSC_XI — external main crystal interface pins connected to internal oscillator which sources reference clock provides a clock for low power operation in deeper sleep modes.
General purpose clock inputs
- MCU_EXT_REFCLK0 — optional external. Provides system clock input (MCU domain).
- EXT_REFCLK1 — optional external System clock input (MAIN domain). Optionally PLL2 (PER1) and MCASP can be sourced by EXT_REFCLK1 (sourced externally).
- SERDES4_REFCLK_P/N — SerDes reference clock input for PCIe or Optional USB3 and SGMII interfaces.
- PCIE_REFCLK[3:0]N/P — There are 4 differential clock input/output pins to support PCIe devices.
External video pixel clock inputs
- VOUT0_EXTPCLKIN — optional for the DPI0 port of DSS.
- VOUT1_EXTPCLKIN — optional for the DPI1 port of DSS.
External CPTS reference clock inputs
- MCU_CPTS_RFT_CLK — CPTS reference clock inputs for MCU_CPTS_RFT_CLK.
- CPTS_RFT_CLK — CPTS reference clock inputs for CPTS_RFT_CLK.
External audio reference clock input/output pins
- AUDIO_EXT_REFCLK0
- AUDIO_EXT_REFCLK1
- AUDIO_EXT_REFCLK2
- AUDIO_EXT_REFCLK3

Figure 6-22 shows the external input clock sources and the output clocks to peripherals.

Figure 6-22 Input Clocks Interface

For more information about Input clock interfaces, see Clocking section in Device Configuration chapter in the device TRM.