Wait Time

Wait time is the maximum delay allowed between two consecutive characters transmitted by the card or an interfacing device. The Character Wait Time (CWT) is the maximum delay between the leading edges of the two consecutive characters in the block, as shown in Figure 20-16. The minimum delay is CGT. The Block Wait Time (BWT) is the maximum delay between the leading edge of the last character of the block received by the card and the leading edge of the first character of the next block transmitted by the card, as shown in Figure 20-17. BWT helps the interfacing device in detecting the unresponsive smart cards. The minimum delay is BGT.