Datasheet

TMS320F28379S

TMS320F28377S

TMS320F28376S, TMS320F28375S, TMS320F28374S

www.ti.com

SPRS881C –AUGUST 2014–REVISED MAY 2016

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

5.7.3 Clock Specifications

5.7.3.1 Clock Sources

Table 5-6 lists four possible clock sources. Figure 5-7 provides an overview of the device's clocking

system.

Table 5-6. Possible Reference Clock Sources

CLOCK SOURCE MODULES CLOCKED COMMENTS

INTOSC1 Can be used to provide clock for:

• Watchdog block

• Main PLL

• 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.