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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RN4870 датащи(PDF) 23 Page - Microchip Technology |
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RN4870 датащи(HTML) 23 Page - Microchip Technology |
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23 / 48 page  2016 Microchip Technology Inc. DS50002489A-page 23 RN4870/71 5.0 APPLICATION REFERENCE CIRCUITS 5.1 External Configuration and Programming The RN4870/71 modules can be configured and firm- ware programmed using an external configuration and programming tool. Figure 5-1 shows the mandatory connections required between the module and the external programming header. It is recommended to include these pin connections on the host PCB for development. For accessing the various configuration and indication pins, use Table 1-2, Table 1-3, Table 1-4 and Table 1-5. 5.2 Reference Circuit Figure 5-2 through Figure 5-5 show the reference circuits for various modules under the RN4870/71 fam- ily. In the circuits, the power input range is 1.9V ~ 3.6V. A battery reverse protection circuit is recommended in case a battery power input is used. Note that the VDD_IO is the same as the power input. In case of a LED connection, the power input must be greater than 3.0V. For the RN4870U, an RF antenna matching circuit must also be included as shown in Figure 5-3. FIGURE 5-1: EXTERNAL PROGRAMMING HEADER CONFIGURATIONS RN4870/71 1P2_0 P2_0 VBAT 1RXD 1TXD 1GND RXD TXD GND 1 VBAT |
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