Specifications

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2. NRST is hardware reset for the module and will be effective with VIL. Configuration
information will be remained after module reset. The module is already designed with RC reset
upon power-on.
3. The pins for reset button and LED indication should be defined according to actual
firmware and circuit design.
4. In default, PIN11 (GPIO2) is the module software reset PIN and will be effective with
VIH. The previous configuration information will be cleared after the module is reset (reset to
factory settings).
5. TX and RX in UART0 are used for communication with external MCU powered by 3V.
Please refer to the description in 3.3. DC Characteristics for UART output current level.
6. It is recommended to ground unused GPIOs with 10pF capacitor.
4.4. Mechanical Dimensions
Fig 6 BL3359-P
Note: Dimensions (13.3±0.2) mm * (21±0.2) mm * (2.6)mm (with shielding case)
4.5. Recommended Pad Size
Please refer to Fig 7 for the recommended pad size
Fig 7 BL3359-P Recommended pad size