Fujitsu MB91150 Series Hardware Manual page 358

CHAPTER 15 UART
Figure 15.9-8 Example of bidirectional communication flow
Set operation mode
Set one-byte data in UODR
NO
Read and process
342
(Sending side)
Start
(0 or 2)
and perform
communication
Does receive
data exist?
YES
receive data
(Receiving side)
Set operation mode (that
matches the sending side)
Send data
Does receive
data exist?
NO
Read and process
receive data
Send data
Send one-byte data
(ANS)
Start
YES