Digilent PmodBT2 Reference Manual - Page 2

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PmodBT2™ Reference Manual
1.2
UART Interface
By default, the UART interface uses a baud rate of 115.2 kbps, 8 data bits, no parity, and a single stop bit. The
startup baud rate may be customized to predefined rates or set to a specific user customized baud rate.
Predefined baud rates range from 1200 to 921k.
The reset pin (RST) on J1 is active low. If the RST pin is toggled, the device will undergo a hard reset. This hard reset
performs similarly to a power cycling of the device. The second interface besides the standard UART signals is the
STATUS pin also on J1The STATUS pin directly reflects the connection status of the device. STATUS is driven high by
the device when connected and is driven low otherwise.
For more information on the devices UART interface and RST and STATUS pins refer to the RN-42 user manual on
the Roving Networks website.
1.3
Command Mode
In order to enter the command mode, the PmodBT2 must receive "$$$" to which it will respond "CMD". When in
command mode, the module will respond to a large number of commands allowing the user to customizing the
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Other product and company names mentioned may be trademarks of their respective owners.
Jumper
Description
JP1 (PIO4)
Factory Default
JP2 (PIO3)
Auto Discovery/Pairing
JP3 (PIO6)
Auto Connect
JP4 (PIO7)
Baud Rate Setting (9600)
Table 1. Set jumper description.
RTS
1
RXD
Roving
2
Network
TXD
3
CTS
4
GND
5
VCC
6
STATUS
7
RST
8
NC
9
NC
10
GND
11
VCC
12
J1
Figure 1. PmodBT2 block diagram.
MISO
1
MOSI
2
SCK
RN-42
3
CS
4
GND
5
VCC
6
J2
JP1
1 2
JP2
3 4
VCC
JP3
5
6
JP4
7
8
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