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RN -41 -DS
   ?
Figure 2 shows the pinout and Table 6 describes the pins.
Figure 2. RN-41/RN-41-N Pinout
GND
1
24
SPI_MISO
GND
1
24
SPI_MISO
SPI_MOSI
GPIO6
GPIO7
RESET
SPI_CLOCK
PCM_CLK
PCM_SYNC
PCM_IN
PCM_OUT
VDD
GND
2
3
4
5
6
7
8
9
10
11
12
RN-41
Top View
23
22
21
20
19
18
17
16
15
14
13
SPI_CSB
GPIO4
GPIO5
GPIO3
GPIO2
USB_D-
USB_D+
UART_CTS
UART_RTS
UART_TX
UART_RX
SPI_MOSI
GPIO6
GPIO7
RESET
SPI_CLOCK
PCM_CLK
PCM_SYNC
PCM_IN
PCM_OUT
VDD
GND
2
3
4
5
6
7
8
9
10
11
12
RN-41-N
Top View
23
22
21
20
19
18
17
16
15
14
13
SPI_CSB
GPIO4
GPIO5
GPIO3
GPIO2
USB_D-
USB_D+
UART_CTS
UART_RTS
UART_TX
UART_RX
35 29 34 33 32 31 28 30
35 29 34 33 32 31 28 30
   ?
Table 6. Pin Description
1
2
3
4
Pin
Name
GND
SPI_MOSI
GPIO6
GPIO7
Description
Ground
Programming only
Set Bluetooth master (high = auto-master mode)
Set baud rate (high = force 9,600, low = 115 K
Default
–
No connect
Input to RN-41with weak pulldown
Input to RN-41 with weak pulldown
or firmware setting)
5
6
7
8
9
10
11
12
13
14
15
16
RESET
SPI_CLK
PCM_CLK
PCM_SYNC
PCM_IN
PCM_OUT
VDD
GND
UART_RX
UART_TX
UART_RTS
UART_CTS
Active-low reset
Programming only
PCM interface
PCM interface
PCM interface
PCM interface
3.3-V regulated power input
Ground
UART receive input
UART transmit output
UART RTS, goes high to disable host transmitter
UART CTS, if set high, it disables transmitter
Input to RN-41 with 1K pullup
No Connect
No Connect
No Connect
No Connect
No Connect
–
–
Input to RN-41
High level output from RN-41
Low level output from RN-41
Low level input to RN-41
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Version 3.3r 4/9/2012
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