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DS50002280A-page 7

RN41/RN41N

TABLE 1-6:

PIN DESCRIPTION

Note 1: Pin numbers 7 through 10 are reserved for future use.

Pin

Symbol

Type

Description

1

GND

Power

Ground reference

2

SPI_MOSI

DI

(Optional) Factory diagnostic and test. See Section 2.8 “SPI Interface”.

3

GPIO6

DIO

Set Bluetooth master (high = auto-master mode)

4

GPIO7

DIO

Set baud rate (high = force 9,600, low = 115K or firmware setting)

5

RESET

DI

Active-low Reset

6

SPI_CLK

DI

(Optional) Factory diagnostic and test. See Section 2.8 “SPI Interface”.

7

PCM_CLK

DIO

8

PCM_SYNC

DIO

9

PCM_IN

DI

10

PCM_OUT

DO

11

VDD

Power

Positive Supply

12

GND

Power

Ground reference

13

UART_RX

DI

UART receive input

14

UART_TX

DO

UART transmit output

15

UART_RTS

DO

UART RTS, goes high to disable host transmitter

16

UART_CTS

DI

UART CTS, if set high, it disables transmitter

17

USB_D+

DIO

USB port. 1.5K pullup activated when USB port is ready (~500 ms after reset).

18

USB_D-

DIO

USB port

19

GPIO2

DIO

Status, high when connected, low otherwise. See Section 2.3 “Connection

Status”.

20

GPIO3

DIO

Auto discovery = high

21

GPIO5

DIO

Status, toggles based on state, low on connect. See Section 2.3 “Connection

Status”.

22

GPIO4

DIO

Set factory defaults. See Section 2.2 “Factory Reset Using GPIO4”.

23

SPI_CSB

DI

(Optional) Factory diagnostic and test. See Section 2.8 “SPI Interface”.

24

SPI_MISO

DO

(Optional) Factory diagnostic and test. See Section 2.8 “SPI Interface”.

25

GND

Power

Ground reference (RN41N only)

26

RF ANT

AIO

Antenna, 50-Ohm impedance (RN41N only)

27

GND

Power

Ground reference (RN41N only)

28

GND

Power

Ground reference

29

GND

Power

Ground reference

30

AIO0

AIO

(Not used) Optional analog input.

31

GPIO8

DIO

UART TX/RX data activity

32

GPIO9

DIO

I/O

33

GPIO10

DIO

I/O (remote DTR signal)

34

GPIO11

DIO

I/O (remote RTS signal)

35

AIO1

AIO

(Not used) Optional analog input