RN41/RN41N

DS50002280A-page 12

 2014 Microchip Technology Inc.

2.10

Application Schematic

Figure 2-7 shows a example application circuit. This schematic is for the RN-41-EK development tool. Refer to Section

1.1 “MCU Interface” for details on how to connect RN41/RN41N to a microcontroller.

FIGURE 2-7:

TYPICAL APPLICATION CIRCUIT

TXD

RX D

GND

1

SPI _MOSI

2

PIO6

3

PIO7

4

RESET

5

SPI _SCK

6

PCM_CL K

7

PCM_SYNC

8

PCM_I N

9

PCM_OUT

10

VDD

11

GND

12

UART_RX

13

UART_TX

14

UART_RTS

15

UART_CTS

16

USB_D+

17

USB_D-

18

PIO2

19

PIO3

20

PIO5

21

PIO4

22

SPI _CS#

23

SPI _MI SO

24

M1

RN41 Module

SPI _MI SO

SPI _MOSI

SPI _SCK

SPI _SS

RT S

CT S

RESET _N

PIO6

PIO7

PIO4

PIO5

PIO3

PIO2

3.3V

PCM_CL K

PCM_SYNC

PCM_OUT

PCM_I N

100k

R17

300k

R18

100k

R16

300k

R15

1

2

3

4

5

6

7

8

9

10

11

12

J1

HEADER 1

1

2

3

4

5

6

7

8

9

10

11

12

J2

HEADER 2

PIO6

PIO7

RESET _N

RX D

TX D

RT S

CT S

PIO4

PIO3

PIO2

PIO11

PIO10

PIO9

PIO8

3.3V

VB1

VB2

SHDN

D_N

D_P

TXD

RXD

RTS

CTS

VBUS

RESET

18

USBDP

14

USBDM

15

CBUS2

10

CBUS1

21

CBUS3

11

CBUS4

9

CBUS0

22

RI

3

DCD

7

DSR

6

DTR

31

CTS

8

RTS

32

RXD

2

TXD

30

OSCI

27

OSCO

28

FT232RQ

U3

100nF

C6

100nF

C5

100nF

C4

GND

5

D+

3

D-

2

VBUS

1

MTAB

6

USB Mini B

J4

3k3

R12

3k3

R13

3k3

R11

3k3

R14

VBUS

3.3V

VBUS

VI N

1

SHDN

3

BYP

4

VOUT

5

U1

TC1185

1uF

C2

1uF

C1

SHDN

3k3

R1

1

2

3

4

S1

3k3

R10

3k3

R9

3k3

R8

3k3

R7

3.3V

PIO4

PIO3

PIO6

PIO7

Red LED

D2

Activity

PIO5

3.3V

PIO8

Green LED

D1

Connection Status

470

R2

470

R3