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| TDA8002C Datasheet, PDF (15/28 Pages) NXP Semiconductors – IC card interface | |||
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Philips Semiconductors
IC card interface
Product speciï¬cation
TDA8002C
Fault detection
The following fault conditions are monitored by the circuit:
⢠Short-circuit or high current on VCC
⢠Removing card during transaction
⢠VDD dropping
⢠Overheating.
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.
handbook, full pagewidth
OSC_INT/64
OFF
PRES
VCC
I/O
CLK
RST
tde
t10
t14
t13
LOW
t12
t11
Fig.14 Emergency deactivation sequence.
FCE480
1999 Oct 12
15
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