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AT86RF211DAI-R 数据表(PDF) 2 Page - ATMEL Corporation |
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AT86RF211DAI-R 数据表(HTML) 2 Page - ATMEL Corporation |
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2 / 48 page  2 AT86RF211 1942C–WIRE–06/02 General Overview General Overview of Functioning The AT86RF211 is a microcontroller RF peripheral: all the user has to do is to write/read registers to setup the chip (i.e. frequency selection) or have information about parame- ters such as RSSI level, Vbattery, PLL lock state. All these operations are carried out via a three-wire serial interface. Normal Mode Thechip isset-upbythe microcontroller: frequency and mode (Rx or Tx). Then it acts like a "pipe": any data entering DATAMSG is immediately radiated (Tx) or any wanted signal collected by the aerial is demodulated, transferred to the microcontroller by the same pin DATAMSG (Rx) as reshaped bits. No data is stored or processed into the chip. See Figure 1. Note: In Rx mode, a clock recovery DATACLK is available on the digital interface to provide the microcontroller with a synchronization signal. Wake-up Mode The chip is set up in a special Rx mode called sleep mode. The chip wakes up periodi- cally thanks to its internal timer (stand alone procedure, the microcontroller is in power- down mode), waiting for an expected message previously defined. If no correct sequence is received, the periodic scan continues. If a correct message is detected, its data field is stored into the AT86RF211 (up to 32 bits) and an interrupt is generated on the WAKEUP pin. See Figure 2 and Figure 3. |
类似零件编号 - AT86RF211DAI-R |
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类似说明 - AT86RF211DAI-R |
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