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2.4 Broadcast Transmission Mode
It is possible to send data by broadcast transmission. Broadcast transmission mode can be used by setting the
destination address to "255" at packet transmission or headerless packet.
In broadcast transmission mode, the sender FDP02 transmits data packet defined times by REG11 register + 1
time. If "Enabling response" function is turned on, the sender FDP02 sends response signal to the host. For
more details, see the section 2.1.
At broadcast transmission mode, the receiver FDP02 does not return ACK signal regardless of the REG18
register setting. Also, when the receiver FDP02 receives redundant data packet, it ignores duplicated
packets .
The below figure shows the data flow of broadcast transmission mode that "Enabling response" and
"Returning P0 and P1 responses" functions of the sender FDP02 is turned on.
① Host 1 inputs broadcast data to the sender FDP02.
② The sender FDP02 recognized the data packet configuration is valid and returns a P1 response to the host 1
(data is accepted).
③ The sender FDP02 broadcasts data packet defined times by REG11 register + 1 by air .
④ When the receiver FDP02 receives the packet correctly, it outputs the received data packet to the host 2 via
the serial port.
⑤ When the sender FDP02 completes all data transmission, it outputs a P0 response to the host 1.
Host 1
Input of data with
destination address
set to "255"
P1 response
"Retransmission
count' + 1" times
P0 response
FDP02 (sender)
①
Wireless transmission
②
Wireless transmission
⑤
FDP02 (receiver)
③
④
③
5
Ver.1.1
Host 2
Data output
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