RN4677
Figure 1-4 and Figure 1-5 show the recommended bypass capacitor location and values. Capacitors can be low ESR
ceramic and must be placed closely to the RN4677 module.
FIGURE 1-4:
RN4677 TO MCU INTERFACE EXAMPLE - LDO
VIN
(3.3V)
LDO
RN4677 Module
MCU
BAT_IN
P15/STATUS_IND_1
I/O
10uF
(3.2 – 4.3V) P04/STATUS_IND_2
I/O
SW_BTN
I/O
NC
LDO33_O
WAKEUP
I/O
RST_N
I/O
VDD
Note 1
P37
VDD_IO (Note 1)
P34
(2.8 – 3.63V)
P33
P32
NC
LDO18_O
Note 2
P31
P05
P00/RTS
P17/CTS
NC
PMULDO_O
TXD
RXD
LED1
P12/SCL
NC
P13/SDA
NC
P36
NC
I/O
I/O
I/O
I/O
I/O
I/O
CTS
RTS
RX
TX
FIGURE 1-5:
Li-ion Battery
(3.7V)
System Configuration
Note: 1. Ensure VDD_IO and MCU VDD voltages are compatible.
2. Control and indication ports are configurable.
RN4677 TO MCU INTERFACE EXAMPLE - BATTERY
(3.3V)
LDO
RN4677 Module
10uF
BAT_IN
(3.2 – 4.3V)
P15/STATUS_IND_1
P04/STATUS_IND_2
10uF
LDO33_O
SW_BTN
WAKEUP
RST_N
P37
VDD_IO (Note 1)
P34
(2.8 – 3.63V)
P33
P32
NC
LDO18_O
Note 2
P31
P05
P00/RTS
P17/CTS
NC
PMULDO_O
TXD
RXD
LED1
P12/SCL
NC
P13/SDA
NC
P36
NC
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CTS
RTS
RX
TX
MCU
VDD
Note 1
DS50002370A-page 8
System Configuration
Note: 1. Ensure VDD_IO and MCU VDD voltages are compatible.
2. Control and indication ports are configurable.
Advance Information
2015 Microchip Technology Inc.