SIGNAL DESCRIPTION

SIGNAL DESCRIPTION

VCC : Power supply input

RST : Either used itself (reset signal supplied from the interface device) or in combination with an internal reset control circuit (optional use by the card). If internal reset is implemented,
the voltage supply on Vcc is mandatory.

CLK : Clocking or timing signal (optional use by the card).

GND : Ground (reference voltage).

VPP : Programming voltage input (deprecated / optional use by the card).

I/O : Input or Output for serial data to the integrated circuit inside the card.

NOTE - The use of the two remaining contacts will be defined in the appropriate application standards.