TMS570LS0332PZ datasheet(36/110 Pages) TI1

36 / 110 page

BIAS_EN

Low-Power

Oscillator

LFEN

LF_TRIM

HFEN

HF_TRIM

CLK80K

CLK10M

CLK10M_VALID

nPORRST

TMS570LS0432, TMS570LS0332

SPNS186B – OCTOBER 2012 – REVISED JUNE 2015

www.ti.com

6.5.1.1.1 Timing Requirements for Main Oscillator

Table 6-9. Timing Requirements for Main Oscillator

PARAMETER

MIN

TYP

MAX

UNIT

tc(OSC)

Cycle time, OSCIN (when using a sine-wave input)

200

tc(OSC_SQR)

Cycle time, OSCIN, (when input to the OSCIN is a square

200

wave )

tw(OSCIL)

Pulse duration, OSCIN low (when input to the OSCIN is a

square wave)

tw(OSCIH)

Pulse duration, OSCIN high (when input to the OSCIN is a

square wave)

6.5.1.2

Low-Power Oscillator

The Low-Power Oscillator (LPO) is comprised of two oscillators — HF LPO and LF LPO.

6.5.1.2.1 Features

The main features of the LPO are:

•

Supplies a clock at extremely low power for power-saving modes. This is connected as clock source #

4 of the Global Clock Module.

•

Supplies a high-frequency clock for nontiming-critical systems. This is connected as clock source # 5

of the Global Clock Module.

•

Provides a comparison clock for the crystal oscillator failure detection circuit.

Figure 6-5. LPO Block Diagram

System Information and Electrical Specifications

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