2.3.2 Typical Stand-Alone Application

Figure 2-4. Typical 3V Stand-Alone Application
Note:
  1. This connection depends on the setting of the bits VS5V and VS22. For more details, refer to the ATA8510/15 Industrial User's Guide (DS50003142).

The preceding figure shows a stand-alone remote control application circuit for 315 MHz or 433.92 MHz running from a 3V lithium cell. The ATA8510 stays in OFFMode until one of the NPWRON ports PC1 – PC5 is pulled to ground level, waking up the circuit. The NPWRON ports PC1 – PC5 have internal 50 kΩ pull-up resistors. If not in use, the user can leave them open.

Use the user application software within the 20-Kbyte Flash (ATA8510) to control the ATA8510 transceiver together with the firmware in the 24-Kbyte ROM. The ATA8515 is not suitable for this application. The RF and decoupling circuitry is similar to Figure 2-3.

In this application, connect an LED to PB7. Alternatively, use an additional wake-up button on PB7 instead of an LED. The user can also connect an LED to PB4.

Note: The additional pull-down resistor connected in parallel is needed to prevent transverse currents in the OFFMode. This special case is only applicable to PB4 because of its active input characteristics (PWRON).