BM20SPKS1NBC View Datasheet(PDF) - Unspecified
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BM20SPKS1NBC Datasheet PDF : 28 Pages
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RN4677
TABLE 1-2: PIN DESCRIPTION (CONTINUED)
RN4677 RN4677U
Pin
Pin
Name
Type
Description
31
—
32
33
Note:
29 GND
Power
Ground reference
30 BT_RF
AIO
External antenna connection (50 Ohm)
— GND
Power
Ground reference
— GND
Power
Ground reference
Pin type abbreviation: A = Analog, D = Digital, I = Input, O = Output.
1.2 Configuring the RN4677
Configuring the RN4677 features are performed using
either RN-style ASCII command documented in the
“RN4677 Bluetooth® Low Energy Dual Mode Module
User’s Guideâ€. Alternatively, it is possible to configure
the RN4677 using the interface as described in
Section 2.2 “External Configuration and
Programmingâ€, along with either external PC
configuration utility (UI Tool or EEPROM Tool), or the
PIC MCU configuration library. For more information,
visit www.microchip.com/rn4677.
1.3 UART Interface
Figure 1-4 and Figure 1-5 show power and MCU
interface examples.
The RN4677 UART pins TXD and RXD connect to the
UART pins of the host MCU. It is highly recommended
to use hardware flow control pins RTS and CTS. By
default, the RN4677 hardware flow control is disabled
and must be configured to become enabled. The UART
Baud is configurable and the available signal rates are
listed in Table 4-5.
1.4 Control and Indication I/O Pins
The configurable control and indication I/O pins are
P00, P05, P17, P31, P32, P33, P34 and P37. The
RN4677 uses control signal as the input, whereas
indication signals are the output. Table 1-3 shows
configurable I/O pin assignments to the control and
indication signals.
Note: RTS is only assigned to P00 and CTS to
P17.
TABLE 1-3:
CONFIGURATION AND
INDICATION I/O
ASSIGNMENTS
Pin Name
Default Configuration
P00
UART_RTS
P05
NO_USE
P17
UART_CTS
P31
INQUIRY_CONFIGURE
P32
LINK_DROP
P33
UART_RX_IND
P34
PAIRING_KEY
P37
LOW_BATTERY_IND
DS50002370A-page 6
Advance Information
 2015 Microchip Technology Inc.
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