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LRI64-A1S/XXX bảng dữ liệu(PDF) 9 Page - STMicroelectronics |
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LRI64-A1S/XXX bảng dữ liệu(HTML) 9 Page - STMicroelectronics |
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9 / 38 page ![]() 9/38 LRI64 VCD TO LRI64 FRAMES Request Frames are delimited by a Start of Frame (SOF) and an End of Frame (EOF) and are imple- mented using a code violation mechanism. Un- used options are reserved for future use. The LRI64 is ready to receive a new command frame from the VCD after a delay of t2 (see Table 14.) after having sent a response frame to the VCD. The LRI64 generates a Power On delay of tPOR (see Table 14.) after being activated by the power- ing field. After this delay, the LRI64 is ready to re- ceive a command frame from the VCD. In ISO 15693 and ISO 18000-3 Mode 1 standards, the SOF is used to define the data coding mode that the VCD is going to use in the following com- mand frame. The SOF that is shown in Figure 8. selects the “1- out-of-4” data coding mode. (The LRI64 does not support the SOF for the “1-out-of-256” data coding mode.) The corresponding EOF sequence is shown in Figure 9. Figure 8. Request SOF, using the “1-out-of-4” Data Coding Mode Figure 9. Request EOF AI06660 37.76 µs 9.44 µs 9.44 µs 37.76 µs 9.44 µs AI06662 9.44 µs 37.76 µs 9.44 µs |
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