AM652X datasheet(146/277 Pages) TI1

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BC1

PORz

BOOTMODE[18:00]

BC2

BC3

MCU_PORz

MCU_BOOTMODE[09:00]

B 4

146

AM6548, AM6528, AM6546

AM6526, AM6527

SPRSP08I – NOVEMBER 2017 – REVISED DECEMBER 2019

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Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527

Specifications

Table 5-19. Boot Configuration Timing Requirements (continued)

NO.

PARAMETER

MIN

MAX

UNIT

BC4

th(MCU_PORz -

MCU_BOOTMODE)

Hold time, All Bootmode pins active after MCU_PORz inactive

(high)

Figure 5-8. Boot Configuration Timing

5.9.4

Clock Specifications

5.9.4.1

Input Clocks / Oscillators

Various external clock inputs are needed to drive the device. Summary of these input clock signals are:

•

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.

•

WKUP_OSC0_XO/WKUP_OSC0_XI —

Еxternal main crystal interface pins connected to internal

oscillator which sources reference clock and provides reference clock to PLLs within MCU domain and

MAIN domain.

•

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.

•

MCU_EXT_REFCLK0 — Optional external 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).

•

SERDES0_REFCLK P/N and SERDES1_REFCLK P/N — SerDes reference clock for PCIe or Optional

USB3.0 PHY.

•

MCU_CPTS0_RFT_CLK — CPTS reference clock inputs for MCU_CPTS0_RFT_CLK.

•

CPTS_RFT0_CLK — CPTS reference clock inputs for CPTS0_RFT_CLK.

•

VOUT1_EXTPCLKIN — Optional for the DPI1 Port of DSS.

•

REFCLK0 P/N and REFCLK1 P/N — There are 2 differential clock output pins to support 2 PCIe

devices.

Figure 5-9 shows the external input clock sources to peripherals.

AM652X Datasheet(PDF) 146 Page - Texas Instruments

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