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LRI512 数据表(PDF) 39 Page - STMicroelectronics |
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LRI512 数据表(HTML) 39 Page - STMicroelectronics |
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39 / 54 page ![]() 39/54 LRI512 POOL EAS Command Code = 0xA2 When receiving the POOL EAS Request, all LRI512 with the non-volatile EAS bit set generate the EAS signal. Request parameter (Table 52 or Table 53): – No parameter Table 52. POOL EAS Request Format for One Sub-carrier Modulation Answer Table 53. POOL EAS Request Format for Two Sub-carrier Modulation Answer POOL EAS Response Format when the request frame is correctly received The LRI512 generates a continuous stream of 256 bits at ‘0’ using the One or Two sub-carrier modu- lation at Low data rate ended by 2 CRC bytes. Figure 43. POOL EAS Frame Exchange between VCD and LRI512 Request SOF Request_Flags POOL EAS IC Mfg code CRC16 Request EOF 0x00 0xA2 0x02 16 bits Request SOF Request_Flags POOL EAS IC Mfg code CRC16 Request EOF 0x01 0xA2 0x02 16 bits AI06841 VCD LRI512 t1 SOF POOL EAS Request EOF 256 `O' using Single sub-carrier modulation at Low data rate |
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