L6470H datasheet(28/70 Pages) STMICROELECTRONICS

Part #	L6470H

Description	dSPIN fully integrated microstepping motor driver with motion engine and SPI

PDF	70 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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28 / 70 page

Functional description

L6470

28/70

Doc ID16737 Rev 4

must be placed as close as possible to the pins. Refer to Table 8 for the choice of load

capacitor values according to the external oscillator frequency.

If a direct clock source is used, it must be connected to the OSCIN pin and the OSCOUT pin

supplies the inverted OSCIN signal (see Figure 12).

Figure 12.

OSCIN and OSCOUT pin configuration

Note:

When OSCIN is UNUSED, it should be left floating.

When OSCOUT is UNUSED, it should be left floating.

6.9

Overcurrent detection

When the current in any of the Power MOSFETs exceeds a programmed overcurrent

threshold, the STATUS register OCD flag is forced low until the overcurrent event has

Table 8.

CL values according to external oscillator frequency

Crystal/resonator freq. (1)

First harmonic resonance frequency.

(2)

Lower ESR value allows the driving of greater load capacitors.

8 MHz

25 pF (ESRmax = 80 Ω)

16 MHz

18 pF (ESRmax = 50 Ω)

24 MHz

15 pF (ESRmax = 40 Ω)

32 MHz

10 pF (ESRmax = 40 Ω)

L6470H Datasheet(PDF) 28 Page - STMicroelectronics