Microchip Technology BM78, Руководство пользователя

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BM78 EVB User’s Guide
DS70005246A-page 18
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2016 Microchip Technology Inc.
2.1.3 Switches
Push-button switches provide the following functionalities:
• SW1 – Push on/off switch button
• SW2 – Wake-up switch to wake up the module from deep-sleep state
• SW3 – Reset button for the BM78 module
• SW4 – Mode switch
Table 2-1 and Table 2-2 provide the details of the SW1 and SW4 switches.
Note: The SW_BTN/SW1 button must be pressed to wake-up the BM78 module.
TABLE 2-1: SWITCH SW1 DETAILS
Part Number Pin Signal Pin Description
SW1 1 GND Connects 20 Kohm pull-down resistance
2 SW_BTN BM78 SW_BTN pin
3 EXT_3V3 Power source from USB 5V to 3.3V LDO
output
4 NC NC
5 NC NC
6 NC NC
TABLE 2-2: SWITCH SW4 DETAILS
Part Number Pin Signal Pin Description
SW4 1 P2_0 P2_0 (pin 18), in the ON state, is connected
with 4.7 kohm to GND.
2 P2_4 P2_4 (pin 19), in the ON state, is connected
with 4.7 kohm to GND.
3 EAN EAN (pin 20), in the ON state, is connected
with 10 ohm to VDD_IO.