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Ver.1.1
Also, the receiver FDP02 sends ACK signal to the sender FDP02 if the function of "Enabling destination
address check at reception" of REG18 register is turned on.
If the sender FDP02 cannot receive ACK signal even it sent packet data defined times by the REG11 register,
it outputs N1 response to the host device via the serial port when "Enabling response" function of REG13
register is turned on. No response signal is sent if the function of "Disabling response" in REG13 is turned
on
The figure below shows an operation example of data packet communication between a sender FDP02 that the
"Enabling response" and "Returning P0 and P1 responses" functions of REG13 register are turned on and a
receiver FDP02 that "Enabling destination address check at reception" function of REG18 register is turned on.
At the figure, data communication is completed by "ACK" signal retry.
① The Host 1 inputs data to the sender FDP02 via the serial port.
② The sender FDP02 recognizes the data packet configuration as valid and returns a P1 response to the Host
1 (Data is accepted).
③ The sender FDP02 transmits the data packet to the destination, which is the receiver FDP02, by wireless
transmission.
④ The receiver FDP02 receives the packet and outputs the received data packet to the Host 2 via the serial
port.
⑤ The receiver FDP02 returns ACK to the sender FDP02 by wireless transmission.
⑥ Time-out is occurred at the sender FDP02 because it cannot receive the receiver's ACK signal at the first
transmission. The sender FDP02 re-sends the data packet transmission.
⑦ The receiver FDP02 receives the same data packet as the previously received one. Thus, the receiver
FDP02 ignores the received data but returns ACK signal to the sender FDP02.
⑧ The sender FDP02 receives the ACK signal and outputs a P0 response to the Host 1.
Host 1
Data input
P1 response
P0 response
FDP02 (sender)
①
②
Wireless transmission
Return of ACK
Time-out
Wireless transmission
Return of ACK
⑧
After entering a command to the sender FDP02, do not input the next command
until the P0 response for the entered command is returned. Sending a new
command before the P0 response is received, it may cause of command error
and/or unpredictable operation.
When "Disabling response" function of REG13 register of the sender FDP02 is
turned on, the next command should be input after waiting a time period of
expected P0 response.
FDP02 (receiver)
③
④
⑤
⑥
⑦
⑦
2
Host 2
Data output
The data same as previously
received data is received and
discarded.
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