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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST25R200 датащи(PDF) 4 Page - STMicroelectronics |
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ST25R200 датащи(HTML) 4 Page - STMicroelectronics |
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4 / 88 page  2 Functional overview 2.1 Block diagram The ST25R200 block diagram is shown in Figure 1. Figure 1. Block diagram Regulators VDD_D VDD_A XTAL OSCILLATOR POR Ref. Bias XTO XTI RC OSCILLATOR DIGITAL SPI FIFO (RAM) 256 Bytes CONTROL LOGIC SPI INTERFACE RX FRAMING WAKE – UP TIMER LEVEL SHIFTERS VDD_IO RESET TX CODING RX Correlator OTP 16 Bytes Protocol timers (MRT, NRT, GPT) VDD_AM VDD AGD Regulators VDD_DR VDD_AM RECEIVER 848 kHz ADC Dual RFI1 RFI2 IRQ TRANSMITTER OOK mod ASK mod RFO1 RFO2 VDD_DR GND_DR GND_A EMD Registers VDD_A VDD_D 2.1.1 Transmitter The transmitter incorporates the drivers, which drive the external antenna through pins RFO1 and RFO2. Both single ‑ended and differential antenna configurations are supported. The transmitter block also generates the OOK or AM modulation of the transmitted RF signal. The transmitter can either operate RFO1 and RFO2 independently to drive up to two antennas in single-ended configuration or operate RFO1 and RFO2 combined to drive one antenna in differential configuration. The drivers are designed to directly drive antenna(s) integrated on the PCB as well as antennas connected with 50 Ω cables. ST25R200 Functional overview DS13658 - Rev 2 page 4/88 |
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