User's Manual

Class 1 Bluetooth v2.0 Module
User’s Guide
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www.lairdtech.com/bluetooth
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3.2.2.3 RS-232 Interface
Signal Name
Pin No
I/O
Comments
UART_TX
23
O
UART_RX
22
I
UART_CTS
25
I
UART_RTS
24
O
UART_DSR
16
I
UART_DTR
29
O
Shared with GPIO3
UART_RI
28
I or O
Direction may be programmed.
UART_DCD
17
I or O
Direction may be programmed.
SPI Bus
Signal Name
Pin No
I/O
Comments
SPI_MOSI
2
I
INTERNAL USE ONLY - Used to reprogram Flash in Laird
production.
SPI_MISO
33
O
SPI_CSB
32
I
SPI_CLK
6
I
3.2.2.4 PCM Interface
Signal Name
Pin No
I/O
Comments
PCM_CLK
7
I or O
If unused keep pins open.
PCM output signals are tri-stated when there is not an active
SCO or eSCO connection.
PCM_IN
9
I
PCM_SYNC
8
I or O
PCM_OUT
10
O
3.2.2.5 General Purpose I/O and ADC
Signal Name
Pin No
I/O
Signal level
Comments
GPIO_3 - 9
3, 4, 16,
17, 18,
19, 29,
30, 31
I or O
See 3.2.2.2
Analogue0, Analogue1
14, 21
I
Range 0 1.8 V
8 bit
3.2.2.6 Miscellaneous
Signal Name
Pin No
I/O
Signal level
Comments
USB D-
27
I
V
IL
max =0.3vdd_usb
V
IH
min =0.7vdd_usb
Normally inactive. Pull to GND
through 10k.
USB D+
26
I
V
IL
max =0.3vdd_usb
V
IH
min =0.7vdd_usb
Normally inactive. Pull to GND
through 10k.
RESET
5
I
V
IL
max=1.0V
V
IH
min=2.3V
Active LOW. The Reset input
contains a 10kΩ pull-up resistor
(internal to module).
Terminology: