AN2871

Supply pins and decoupling

Doc ID 15304 Rev 3

17/25

4

Supply pins and decoupling

SPC560Pxx family devices have different pins supply voltages. For example the

SP560P50xx has six different pins supply voltage as follow:

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for all the others family devices supply signals refer to the relative device datasheet.

4.1

Supply pins description and circuit

Table 7 lists the power supply and reference voltages for the SPC560P50xx devices.

Table 7.

Supply pins on SPC560P50XX LQFP144

Supply

Symbol

Description

BCTRL

Voltage regulator external NPN ballast base control pin

VDD_HV_REG

(3.3 V or 5.0 V)

Voltage regulator supply voltage

VDD_LV_REGCOR

1.2 V decoupling pins for core logic and regulator feedback. Decoupling

capacitor must be connected between these pins and VSS_LV_REGCOR.

VSS_LV_REGCOR

1.2 V decoupling pins for core logic and regulator feedback. Decoupling

capacitor must be connected between these pins and VDD_LV_REGCOR.

ADC0 supply and high reference voltage

VSS_HV_AD0

ADC0 ground and low reference voltage

VDD_HV_AD1

ADC1 supply and high reference voltage

VSS_HV_AD1

ADC1 ground and low reference voltage