STA1275 datasheet(83/109 Pages) STMICROELECTRONICS

Part #	STA1275

Description	Accordo5 - Automotive infotainment processors for display audio and cluster applications

PDF	109 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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83 / 109 page

DS12586 Rev 5

83/109

STA1295, STA1275

Electrical characteristics

106

Figure 3. Signal overshoot and undershoot limits

The maximum signal level allowed is Vddnom + 0.3 V.

Signal overshoots up to V(os) (that is 0.5 V above Vddnom level) are allowed, for a time

T(os) that must be shorter than the smaller between 2nsec and 1/3 of the signal's Tcycle

(that is 2nsec for "slow" signals, 1/3 of the cycle time for “fast” signals).

Signal undershoots up to V(us) (that is 0.5 V below Gnd level) are allowed, for a time T(us)

that must be shorter than the smaller between 2nsec and 1/3 of the signal's Tcycle (that is

2nsec for "slow" signals, 1/3 of the cycle time for "fast" signals).

4.8

AC characteristics

4.8.1

Oscillator electrical specifications

This device contains two oscillators:

•

a 32.768 kHz oscillator

•

a 24-26 MHz oscillator

Each requires a specific crystal, with parameters that must be as close as possible to the

following recommended values.

Clock from external source can also be applied on input pins.

4.8.2

32.768 kHz oscillator specifications

The internal oscillator amplifier specifications are shown in the table below:

STA1275 Datasheet(PDF) 83 Page - STMicroelectronics