公开(公告)号：EP4156428A1

公开(公告)日：2023-03-29

申请号：EP22192315.4

申请日：2022-08-26

Applicant: STMicroelectronics S.r.l.

Inventor： SOLE, Luigi ,  GAUDIANO, Rossella ,  CANTARINI, Marta ,  ERRICO, Nicola ,  GIORDANO, Antonio

IPC: H02J1/08

Abstract: A system basis chip (30a) is described. The system basis chip (30a) comprises a power supply circuit (300a) configured to receive an input voltage (V in ) and generate a plurality of voltages (V pre , V core , V I/O , V ext , V 1 , V 2 , V 3 ), and a control circuit (40).
Specifically, the power supply circuit (300a) is configured to selectively switch on a first (Va) and a second (Vb) voltage of the voltages (V pre , V core , V I/O , V ext , V 1 , V 2 , V 3 ) as a function of a control signal (CTRL). The control circuit (40) measures a resistance value of an external resistor (R set ) connected to a terminal (340) and selects one of a plurality of configurations as a function of the measured resistance value, wherein a first configuration (CFG1) indicates that said first voltage (Va) should be switched on before said second voltage (Vb) and a second configuration (CFG2) indicates that said second voltage (Vb) should be switched on before said first voltage (Va). Accordingly, the control circuit (40) may generate the control signal (CTRL) in order to switch on in sequence the first (Va) and the second (Vb) voltage according to the selected configuration (CODE).