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A7108 Datasheet(PDF) 39 Page - List of Unclassifed Manufacturers |
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A7108 Datasheet(HTML) 39 Page - List of Unclassifed Manufacturers |
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39 / 57 page ![]() A7108 315/433/868/915MHz FSK/GFSK Transceiver Apr., 2011, Version 0.2 AMICCOM Electronics Corporation 39 14.3 Direct mode 经由设定 FMS=0,MCU 可以经由 A7108 送出客制化的封包。在 TX mode,MCU 必须将客制化的封包依序 一个 bit 接着一个 bit 传送至 GIO1 或 GIO2。在 RX mode,被接收下来的数据会可以被设定到 GIO1 或 GIO2 输出。但请注意,为了提供 A7108 比较适当的 DC 参考电压,客制化封包的 pream bl e 要有 32-bi t 的 长度。在校正程序后 或每个传输程序后,使用者必须使用 Str obe com mand 完全的控制 A7108。 Dir ect mode 是适用于各式各样的封包格式。 图 14.4 与 图 14.5 分别是 Dir ect mode 在 TX 与 RX 时序图。图 14.6 是 di rect m ode 的状态图。 Strobe CMD (SCS,SCK,SDIO) T0 T4 T1 TX Strobe GIO1 Pin - WTR (GIO1S[3:0]=0000) RF settling (PDL+TDL) STB strobe Preamble + customized raw TXD RFO Pin Manually back to STB GIO1 Pin - TMEO (GIO1S[3:0]=0010) GIO2 Pin - TXD (GIO2S[3:0]=1001) Carrier only Modulated signals 32-bits preamble Modulation auto enable T3 图 14.4 Direct Mode TX 时序图 Strobe CMD (SCS,SCK,SDIO) T0 T4 T1 RX Strobe GIO1 Pin - WTR (GIO1S[3:0]=0000) RX settling STB strobe Preamble + customized raw TXD RFO Pin Manually back to STB GIO1 Pin - PMDO (GIO1S[3:0]=0011) GIO2 Pin - RXD (GIO2S[3:0]=1000) Wait packet Coming packet Preamble detect output T3 图 14.5 Direct Mode RX 时序图 |
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