Patent ID: 8054124

Claim:
A programmable electronic device with at least one programming data connection (X 5 ), which can be switched at will by increasing the operating voltage (UB) at least of a portion of the electronic device for taking over programming data, with an internal voltage controller ( 2 ), which generates the operating voltage (UB) from a higher supply voltage, and which is switchable for generating a higher operating voltage (UB) by applying a higher voltage to an also otherwise voltage carrying polarity reversal protected connection (X 1 ), or by applying an external voltage to an output connection (X 2 ), which is protected against polarity reversal, wherein the connection between the connection (X 1 ) or the output connection (X 2 ) and the internal voltage controller ( 2 ) leads through a destructible component (Si 1 ), which is destructible by current overload, whose output at the voltage controller side is additionally connected to ground through a diode (D 3 ), which has a polarity so that it blocks when the correct polarity voltage is applied to the connection (X 1 ) or to the output connection (X 2 ) wherein a Zener diode (D 2 ) is disposed between the connection (X 1 ) or the output connection (X 2 ) and the destructible component (Si 1 ), said Zener diode (D 2 ) having a polarity, so that it blocks when a correct polarity voltage is applied to the connection (X 1 ) or to the output connection (X 2 ), and a very high value resistor (R 5 ) branches off to ground between the Zener diode (D 2 ) and the destructible component (Si 1 ).