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Philips Semiconductors
IC card interface
Fault detection
The following fault conditions are monitored by the circuit:
Short-circuit or high current on V
Removing card during transaction
V
dropping
DD
Overheating.
handbook, full pagewidth
OSC_INT/64
OFF
PRES
V CC
I/O
CLK
RST
1999 Oct 12
CC
t 10
t 13
t 12
t 11
Fig.14 Emergency deactivation sequence.
When one or more of these faults are detected, the circuit
pulls the interrupt line OFF to its active LOW state and a
deactivation sequence is initiated. In the event that the
card is present the interrupt line OFF is set to HIGH state
when the microcontroller has reset the CMDVCC line
HIGH (after completion of the deactivation sequence).
In the event that the card is not present OFF remains
LOW.
t de
t 14
LOW
15
Product specification
TDA8002C
FCE480
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