DM504 datasheet(89/211 Pages) TI1

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DEVICE

clkout0

To quartz (from oscillator output).

resetn

rstoutn

External Reference Clock [0:1].

For Audio and other Peripherals

xref_clk1

sysboot[15:0]

From quartz (19.2, 20 or 27 MHz)

or from CMOS square clock source (19.2, 20 or 27MHz).

Boot Mode Configuration

xi_osc1

Warm reset output.

Device reset input.

porz

Power ON Reset.

xi_osc0

xo_osc0

xo_osc1

From quartz (range from

MHz)

or from CMOS square clock source(range from

MHz).

19.2 to 32

12 to 38.4

To quartz (from oscillator output).

clkout1

clkout2

xref_clk0

Output clkout[0:2] clocks come from:

• Either the input system clock and alternate clock (xi_osc0 or xi_osc1)

• Or a CORE clock (from CORE output)

• Or a 192-MHz clock (from PER DPLL output).

SPRS91v_CLK_01

DM504

www.ti.com

SPRS977A – NOVEMBER 2016 – REVISED JANUARY 2017

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Specifications

Figure 5-4. Clock Interface

5.9.4.1

Input Clocks / Oscillators

•

The source of the internal system clock (SYS_CLK1) could be either:

–

A CMOS clock that enters on the xi_osc0 ball (with xo_osc0 left unconnected on the CMOS clock

case).

–

A crystal oscillator clock managed by xi_osc0 and xo_osc0.

•

The source of the internal system clock (SYS_CLK2) could be either:

–

A CMOS clock that enters on the xi_osc1 ball (with xo_osc1 left unconnected on the CMOS clock

case).

–

A crystal oscillator clock managed by xi_osc1 and xo_osc1.

SYS_CLK1 is received directly from oscillator OSC0. For more information about SYS_CLK1 see Device

TRM, Chapter: Power, Reset, and Clock Management.

5.9.4.1.1 OSC0 External Crystal

An external crystal is connected to the device pins. Figure 5-5 describes the crystal implementation.

DM504 Datasheet(PDF) 89 Page - Texas Instruments

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