BM78_V01 datasheet(19/60 Pages) MICROCHIP

部品番号	BM78

部品情報	Bluetooth® Dual-Mode Module

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 2016-2019 Microchip Technology Inc.

DS60001380B-Page 19

BM78

2.9

Host MCU Interface over UART

Figure 2-8 illustrates the UART interface with host

MCU and power scheme using 3.3V to the VDD. Bat-

tery power is applied to the BAT_IN pin. From the

LDO33_O pin, voltage can be routed to the VDD_IO

pin and external circuitry including the MCU. This

power scheme ensures that the BM78 module and

MCU I/O voltages are compatible.

FIGURE 2-8:

POWER AND MCU INTERFACE EXAMPLE FOR BM78 MODULE

Note:

The internal 3.3V LDO current source

must not exceed maximum value of



50 mA.

Note 1: Ensure that VDD_IO and MCU VDD voltages are compatible.

2: The control and indication ports are configurable.

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