DataCard CP60 Service Manual page 43

6.
The clock signal is activated.
7.
The reader releases the Reset by bringing it to a high voltage.
8.
The card then issues its Answer To Reset (ATR). The ATR is a hexadecimal
string up to 32 characters and contains:
•
•
•
•
•
•
9.
With communication parameters known, the interface can begin to
communicate with the card.
10.
Serial communication across the I/O line commences.
11.
If necessary, the voltage on Vpp is altered, and information can be written to
the card.
CP60 and CP60 Plus Service Manual
The format of the communication
Permissible baud rates
Parameters of the circuitry in the card
Required programming voltage on Vpp
The make and model of the card
Other information the manufacturer chooses
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