TC1724 Datasheet, PDF (96/134 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1724
Electrical Parameters
– AND additionally before power-up / after power-down:
1 mA for one pin in inactive mode (0 V on all power supplies)
• The PORST signal may be deactivated after all VDD3.3, and VAREF0 power-
supplies and the oscillator have reached stable operation, within the normal
operating conditions.
• At normal power down the PORST signal should be activated within the normal
operating range, and then the power supplies may be switched off. Care must be
taken that all Flash write or delete sequences have been completed.
• In case of a power-loss at any power-supply, all power supplies must be powered-
down, conforming at the same time to the rule number 2.
• Although not necessary, it is additionally recommended that all power supplies are
powered-up/down together in a controlled way, as tight to each other as possible.
• Additionally, regarding the ADC reference voltage VAREF0:
– VAREF0 must power-up at the same time or later then VDDM, and
– VAREF0 must power-down either earlier or at latest to satisfy the condition
VAREF0 < VDDM + 0.5 V. This is required in order to prevent discharge of
VAREF0 filter capacitance through the ESD diodes through the VDDM power
supply. In case of discharging the reference capacitance through the ESD diodes,
the current must be lower than 5 mA.
Data Sheet
5-51
V1.2, 2014-06