AN3190 datasheet(16/56 Pages) STMICROELECTRONICS

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Pad compatibility

AN3190

16/56

Doc ID 17333 Rev 2

2.4

Oscillator pads

Both devices, SPC560Px and SPC56EL60, have two pads dedicated to the internal

oscillator: pad 29 and pad 30.

The SPC560Px/SPC56EL60 compatibility depends on the configuration of the internal

oscillator.

If the oscillator is configured as bypass mode, the two pads are fully compatible (see

Figure 1 and Figure 2).

If the internal oscillator is working in crystal/oscillation mode (see Figure 3 and Figure 4) the

compatibility is achieved only if Rd is a 0

Ω resistor.

Table 5.

Non-compatible pad 123: Functional on SPC560Px – JCOMP on SPC56EL60

Pad No.

SPC56EL60

function

SPC560Px

function

Comment

123 (A.123)JCOMP

GPIO[41] - C[9]

SPC56EL60 does not support this function.

FlexPWM 0 - FAULT[2]

SPC56EL60 supports this function on pad 33 and

77. Compatibility can be achieved using pad 77.

DSPI 2 - CS 3

SPC56EL60 supports this function on pad 77, 82,

85 and 117. Compatibility can be achieved using

pad 82.

FlexPWM 0 - X[3]

SPC56EL60 supports this function on pad 34, 85

and 140. Compatibility can be achieved using pad

85 and 140.

Figure 1.

SPC560Px XOSC circuit – bypass

mode configuration

Figure 2.

SPC56EL60 XOSC circuit – bypass

mode configuration(1)

In this mode, the analog portion of crystal oscillator (amplifier) is disabled. An external clock, compatible to CMOS levels,

can be applied at EXTAL pad.

XTAL

Pin 29

EXTAL

Pin 30

40 MHz Clock

VSS_HV_OSC Pin 28

XTAL

Pin 29

EXTAL

Pin 30

40 MHz Clock

VSS_HV_OSC Pin 28

XTAL

Pin 29

EXTAL

Pin 30

40 MHz Clock

VSS_HV_OSC Pin 28

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