TMS320F28075PZP datasheet(47/192 Pages) TI

47 / 192 page

7.9.3 Clock Specifications

7.9.3.1 Clock Sources

Table 7-2 lists four possible clock sources. Figure 7-7 provides an overview of the device's clocking system.

Table 7-2. Possible Reference Clock Sources

CLOCK SOURCE

MODULES CLOCKED

COMMENTS

INTOSC1

Can be used to provide clock for:

•

Watchdog block

•

CPU-Timer 2

Internal oscillator 1.

Zero-pin overhead 10-MHz internal oscillator.

INTOSC2(1)

Can be used to provide clock for:

•

Main PLL

•

Auxiliary PLL

•

CPU-Timer 2

Internal oscillator 2.

Zero-pin overhead 10-MHz internal oscillator.

XTAL

Can be used to provide clock for:

•

Main PLL

•

Auxiliary PLL

•

CPU-Timer 2

External crystal or resonator connected between the X1 and X2 pins

or single-ended clock connected to the X1 pin.

AUXCLKIN

Can be used to provide clock for:

•

Auxiliary PLL

•

CPU-Timer 2

Single-ended 3.3-V level clock source. GPIO133/AUXCLKIN pin

should be used to provide the input clock.

(1)

On reset, internal oscillator 2 (INTOSC2) is the default clock source for both system PLL (OSCCLK) and auxiliary PLL (AUXOSCCLK).

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TMS320F28076, TMS320F28075

SPRS902J – OCTOBER 2014 – REVISED FEBRUARY 2021

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