TC1115 Datasheet, PDF (71/103 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller Advance Information

TC1115
Advance Information
Functional Description
3.24
Power Sequencing
During power-up, reset pin PORST has to be held active until both power supply
voltages have reached at least their minimum values.
During the power-up time (rising of the supply voltages from 0 to their regular operating
values), it must be ensured, that the core V_DD power supply reaches its operating value
first, and then followed by the GPIO V_DDP power supply. During the rising time of the
core voltage, it must be ensured that 0< V_DD-V_DDP <0.5 V.
During power-down, the core power supply V_DD and GPIO power supply V_DDP must be
switched off completely until all capacitances are discharged to zero before the next
power-up.
Note: The state of the pins are undefined when only the port voltage V_DDP is switched
on.
Data Sheet
65
V1.0, 2005-02