2.3.8. EMV character timing for T=0 (character protocol)

The minimum interval between the leading edges of the start bits of two consecutive characters sent by the interface to the Smart Card is between 12 and 266 etus as indicated by the value of TC1 returned within the ATR stream.

The minimum interval between the leading edges of the start bits of two consecutive characters sent by the Smart Card to the interface is 12 etus.

The maximum interval between the start leading edge of any character sent by the Smart Card and the start leading edge of the previous character sent either by the Smart Card or the interface (the work waiting time) will not exceed 960 x D x WI = 9600 etus. (The bit rate conversion factor, D, will have a default value of 1. WI will not have a default value of 10 as TC2, which would contain the value, is not returned in the ATR.)

The minimum interval between the leading edges of the start bits of two consecutive characters sent in opposite directions will be 16 etus.

Note

The minimum interval between the leading edges of the start bits of two characters sent by interface to the Smart Card is always governed by the value of TC1. It may be less than minimum interval of 16 etus allowed between two characters sent in opposite directions.

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