DVK-PRM112 Laird Technologies, DVK-PRM112 Datasheet - Page 20

• Manufacturer Part Number: DVK-PRM112
• Description: KIT FOR PRM112
• Manufacturer: Laird Technologies
• Series: FlexRF™r
• Type: Transceiver, FHSSr

Specifications of DVK-PRM112

• Frequency: 2.4GHz
• Output Power: 50 mW
• Antenna: U.FL Coaxial
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: RF Module
• Kit Contents: 2x RF Module, 2x Adapter Board, CD, 2x AC Power Adapters, 2x DB9
• Rohs Compliant: Yes
• For Use With/related Products: PRM112
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

LT2510
Wireless Module
THEORY OF
OPERATION
17 www.lairdtech.com
*GIO_8 (Pin 18) on board revisions 0050-00203 Rev 0 and 0050-00196 rev 2 (and below) is internally not
connected. This pin is unavailable as a GPIO on these boards.
Sleep Indicator (EEPROM 0x45, bit 6)
When enabled, GIO_1 will toggle Low during sleep and high when the module is awake.
Auto Destination on Beacons Only (Address 0x56, bit 7)
When Auto Destination is enabled, the Client radio will address itself to the source of any received packet, including
beacons from the server and any addressed or broadcast packets it receives. For point to multipoint networks where
the Client is intended to only communicate back to the Server, this could cause the Client to inadvertently become
addressed to another Cleint. By enabling Auto Destination on Beacons Only, the Client will only address itself upon
reception of Beacons, therefore it will only address itself to the Server. Auto Destination on Beacons Only is only
functional when Auto Destination is also enabled.
Hop Packet Delineation (EEPROM 0x57, bit6)
When enabled, in addition to using RF Packet Size and Interface Timeout as criteria for processing incoming data,
the radio will also delineate packets up to once per hop once a minimum of six characters has been received over the
serial port.
Discard Framing Error Packets (EEPROM 0x57, bit 7)
When set, the radio checks for a framing error in the UART buffer before processing incoming data. If an error is
detected on any of the bytes in the buffer, the entire buffer is discarded.
Beacon Skip (EEPROM 0x6F)
When set, the transceiver will send (Server) or listen (Client) for a beacon on hops spaced by the Beacon Skip
number. On a Client, once the Beacon Skip count is reached the Client will listen every hop until it successfully hears
a beacon. It will then wait a number of hops specified by the Beacon Refresh before listening again.
Enabling this will allow the transceiver to conserve power by disabling its RF circuitry during the beacon time.
Enabling this on the Server will cause substantially longer sync times on the Clients.
Address 0x60, Bit
Bit 0 set
Bit 1 set
Bit 2 set
Bit 3 set
Bit 4 set
Bit 5 set
Bit 6 clear, Bit 7 clear
Bit 6 set, Bit 7 clear
Bit 7 set
• When using GIO_7/GIO_3 Pairs, the input/output will be digital unless Remote Analog Enable bit is set
• TXD and RXD are not available for UART serial data when used as in Remote I/O. Force 9600 must be
• When not using pairs (bit 7 clear), one radio should have all I/O as inputs and the other radio or radios
• Remote I/O Mode must be enabled on both the local and remote radio and the Remote I/O Control Bit
• All I/O state information for all lines is transmitted when any update is triggered. Thus, on the receiving
ENGINEER’S TIP
(Address 0x57, bit 4) in which case the input is Analog and the output is PWM.
Low on boot to disable Remote I/O Mode and issue commands.
should have all I/O as output.
must be set for the same pair on both radios.
radio any enabled output pins will be updated, regardless of whether those pins were enabled on the
transmitting radio.
Input
GIO_4
GIO_8*
GIO_7
CMD/Data
RTS
RXD
All I/O are Outputs
All I/O are Inputs
Inputs and Outputs are as specified in table
Output
GIO_0
GIO_1
GIO_3
GIO_2
CTS
TXD
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