BM70 Datasheet, PDF (13/64 Pages) Microchip Technology – Bluetooth® Low Energy (BLE) Module

BM70/71
2.0 APPLICATION INFORMATION
2.1 Reference Schematics
Figure 2-1 through Figure 2-4 illustrate the BM70/71
reference circuits for various Stock Keeping Units
(SKUs). The GPIOs are configurable and the connec-
tion depends on the user’s application circuit.
The power input range is 1.9V~3.6V. If the battery is
used, the battery reverse protection circuit is
recommended. The VDD_IO voltage is same as power
input. If the LED is used, ensure that the voltage is
more than 3V to drive the LED. A 1.8V Reset IC is
added as an optional circuit to prevent the Flash data
crash when VBAT power is unstable. It is recommended
to implement the RF antenna matching circuit as
illustrated in Figure 2-3 and Figure 2-5 to fine tune the
antenna impedance matching.
FIGURE 2-1:
BM70BLES1FC2 REFERENCE CIRCUIT
FIGURE 2-2:
BM70BLES1FC2 REFERENCE CIRCUIT
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DS60001372D-Page 13