This time-out may be disarmed after receiving 8 data (F1FI flag set) or after receiving
end of frame (EOFI flag set) in case of block length less than 8 data (1, 2 or 4).
Data Reading
Data is read from the FIFO by reading to MMDAT register. Each time one FIFO
becomes full (F1FI or F2FI set), user is requested to flush this FIFO by reading 8 data.
Figure 99. Data Stream Reception Flows
Data Stream
Reception
Data Stream
Initialization
Data Stream
Reception ISR
Unmask FIFOs Full
F1FM = 0
FIFO Full?
F1FI or F2FI = 1?
FIFO Full?
F1FI or F2FI = 1?
F2FM = 0
FIFO Reading
read 8 data from MMDAT
FIFO Reading
read 8 data from MMDAT
No More Data
To Receive?
No More Data
To Receive?
Mask FIFOs Full
F1FM = 1
Send
STOP Command
F2FM = 1
Send
a. Polling mode
STOP Command
b. Interrupt mode
148
AT8xC51SND2C
4341D–MP3–04/05
ATMEL [ ATMEL ]
