Laird LT2510 User Manual page 16

LT2510
Wireless Module
THEORY OF
OPERATION
13 www.lairdtech.com
Auto Destination (EEPROM 0x56, bit 4)
To simplify EEPROM programming, Auto Destination can be enabled in the radio which allows the radio to
automatically set its destination to the address of the radio from which it last received a successful transmission
from (beacon or data packet).
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.
Auto System ID (EEPROM 45, bit 4)
When enabled this will allow a client to attach to any server on the same RF Channel, regardless of the System ID on
the server or the client.
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.
Broadcast (EEPROM 0xC1, bit 7)
In Broadcast mode, the transceiver will transmit the packet to all transceivers with the same Channel Number and
System ID settings. There is no RF acknowledgement sent from the recipient(s) back to the transmitter, therefore the
packet is sent out the number of times specified by Broadcast Attempts.
Broadcast Attempts (EEPROM 0x4D)
When transmitting broadcast packets, the RF packet is broadcast out to all eligible receivers on the network.
Broadcast Attempts is used to increase the odds of successful delivery to the intended receivers. Transparent to the
OEM host, the transmitter will send the RF packet to the receivers. If a receiver detects a packet error, it will throw
out the packet. This will continue until the transmitter exhausts all of its attempts. Once the receiver successfully
receives the packet it will send the packet to the OEM host. It will throw out any duplicates caused by further
Broadcast Attempts. The received packet will only be sent to the OEM host if it is received free of errors. Because
broadcast packets have no RF acknowledgement, each packet is transmitted the number of times specified by
Broadcast Attempts. This makes for very inefficient use of the available bandwidth; therefore, it is recommended that
Broadcast Attempts be set as Low as possible and that broadcast packets be limited in use.
Note: Setting to 0 is equal to 256.
Destination Address (EEPROM 0x70-0x75)
The Destination Address is simply the MAC (IEEE) address of the intended receiver on the network. In Addressed
Mode, the RF packet is sent out to the intended receiver designated by the Destination Address. Only the four
LSBs (Least Significant Bytes) of the Destination Address are actually used for packet delivery. This field is ignored if
Broadcast Mode, Auto Destination or Transmit API is enabled.
Disable Status Bin (EEPROM 0xC1, bit 4)
When set, disables the reception on the status slot of the bin. The result is that the Bin Analyzer and Remote I/O
functionality will be disabled on the radio with the benefit of saving approximately 1mA average current consumption.
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.
Laird Technologies