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BM83 Datenblatt(PDF) 41 Page - Microchip Technology

Teilenummer BM83
Bauteilbeschribung  BM83 Bluetooth짰 Stereo Audio Module Data Sheet
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

BM83 Datenblatt(HTML) 41 Page - Microchip Technology

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6.
Application Information
6.1
Host MCU Interface Over UART
The BM83 module supports UART commands, which enable an external MCU to control the BM83 module. The
following figure illustrates the UART interface between the BM83 module and an external MCU. An external MCU can
control the BM83 module over the UART interface and wake up the module with the MFB and P0_0 pins.
Refer to SPKcommandset tool to get a list of functions supported by the BM83 module and how to use the Config
Tool for configuring UART and UART command set tool.
Figure 6-1. Host MCU Interface Over UART
MCU
MCU_WAKE UP
UART_RX
UART_TX
BT_WAKE UP
P0_0
UART_TXD
UART_RXD
MFB
BM83
Note:  For the latest SPKcommandset tool, refer to http://www.microchip.com/BM83.
The following figures illustrate the timing sequences of various UART control signals.
Figure 6-2. Power ON/OFF Sequence
BAT_IN
SYS_PWR
1 ms
Power-
on/initial
idle
Power-on
Power-on
Power-off
idle
MCU state
PWR (MFB)
BK_OUT/LDO31_VO
400 ms
RST_N
MCU sends UART command
(UART_RX)
UART
Command
MCU sends power-
off UART Command
Power-on ACK
ACK
ACK
Bluetooth response UART state
(UART_TX)
any
10 ms
20 ms
Keep all Bluetooth
and MCU
connection to
low level
2s
> 1s
BM83
Application Information
© 2019 Microchip Technology Inc.
Preliminary Datasheet
DS70005402A-page 41


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