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ST7540 Scheda tecnica(PDF) 5 Page - STMicroelectronics |
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ST7540 Scheda tecnica(HTML) 5 Page - STMicroelectronics |
5 / 44 page ST7540 Pin settings 5/44 2 Pin settings 2.1 Pin connection Figure 2. Pin connection (top view) 2.2 Pin description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 CD_PD REG_DATA GND RxD RxTx TxD BU/THERM CLR/T VDD MCLK RSTO UART/SPI WD PA_IN- TEST2 TEST1 VDC RX_IN CL Vsense X2 X1_OSCIN SVSS TX_OUT PA_IN+ VCC VSS PA_OUT Table 1. Pin description N° Name Type Description 1 CD_PD Digital/Output Carrier, preamble or frame header detect output. "1" No carrier, preamble or frame header detected "0" Carrier, preamble or frame header detected 2REG_DATA Digital/Input with internal pull-down Mains or control register access selector "1" - Control register access "0" - Mains access 3 GND Supply Digital ground 4 RxD Digital/Output RX data output. 5 RxTx Digital/Input with internal pull-up Rx or Tx mode selection input. "1" - RX Session "0" - TX Session 6TxD Digital/Input with internal pull-down TX data input. |
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