Microchip Technology RN-XV Evaluation Kit RN-XV-EK1 RN-XV-EK1 Data Sheet
Product codes
RN-XV-EK1
www.rovingnetworks.com
Version 1.0 12/3/12
page 7
RN4142XV-DS
4.0
DESIGN CONCERNS
The following sections provide information on design-
ing with the RN41XV and RN42XV module, including
radio interference, factory reset, connection status, etc.
ing with the RN41XV and RN42XV module, including
radio interference, factory reset, connection status, etc.
4.1
Powering the Module
Apply ONLY 3.3 V ±10% regulated power to pin 1
(VDD) and pin 10 (ground). The module does not have
an on-board voltage regulator and MUST be powered
from a regulated 3.3 V power supply.
(VDD) and pin 10 (ground). The module does not have
an on-board voltage regulator and MUST be powered
from a regulated 3.3 V power supply.
4.2
Reset Circuit
The RN41XV and RN42XV modules contain a 1k
Ω pul-
lup to VCC, and the reset polarity is active low. The
module’s reset pin has an optional power-on-reset cir-
cuit with a delay, which should only be required if the
input power supply has a very slow ramp or tends to
bounce or have instability on power up. Often a micro-
controller or embedded CPU I/O is available to gener-
module’s reset pin has an optional power-on-reset cir-
cuit with a delay, which should only be required if the
input power supply has a very slow ramp or tends to
bounce or have instability on power up. Often a micro-
controller or embedded CPU I/O is available to gener-
ate the reset once power is stable. If not, designers can
use one of the many low-cost power supervisor chips
currently available, such as the MCP809,
MCP102/121, and Torex XC61F.
use one of the many low-cost power supervisor chips
currently available, such as the MCP809,
MCP102/121, and Torex XC61F.
4.3
Factory Reset Using GPIO4
Roving Networks recommends that designers connect
GPIO4 (pin 8) to a switch, jumper, or resistor so it can
be accessed. This pin can be used to reset the module
to its factory default settings, which is critical in situa-
tions where the module has been misconfigured. To
reset the module to the factory defaults, GPIO4 should
be high on power-up and then toggle low, high, low,
high with a 1 second wait between the transitions.
GPIO4 (pin 8) to a switch, jumper, or resistor so it can
be accessed. This pin can be used to reset the module
to its factory default settings, which is critical in situa-
tions where the module has been misconfigured. To
reset the module to the factory defaults, GPIO4 should
be high on power-up and then toggle low, high, low,
high with a 1 second wait between the transitions.
4.4
Connection Status
The RN41XV and RN42XV modules have an on-board
green LED to indicate the connection status. The con-
nection status LED is located in the lower right corner
of the module.
green LED to indicate the connection status. The con-
nection status LED is located in the lower right corner
of the module.
TABLE 4-1:
CONNECTION STATUS LED
LED Status
Description
Blink at 1 Hz
The module is discoverable and waiting for a connection.
Blink at 10 Hz
The module is in command mode.
Solid
The module is connected to another device over Bluetooth.