HD64F38602R Datasheet, PDF (331/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 15 Synchronous Serial Communication Unit (SSU)
Start
Initialization
[1]
Read TDRE bit in SSSR
No
TDRE = 1?
Yes
Write transmit data
in SSTDR
[1] After reading SSSR and confirming
that the TDRE bit is 1, write transmit
data in SSTDR. Then the TDRE bit is
automatically cleared to 0.
[2]
Data transmission
Yes
continued?
No
[3]
Read TEND bit in SSSR
No
TEND = 1?
Yes
Clear TEND bit and
TE bit in SSER to 0
[2] Determine whether data transmission
is continued.
[3] Read 1 from the TEND bit in SSSR
to confirm that data transmission is
completed. After the TEND bit is set to 1,
clear the TEND bit and TE bit in SSER
to 0 and transmit mode is ended.
End
Figure 15.6 Sample Serial Transmission Flowchart
Rev. 3.00 May 15, 2007 Page 299 of 518
REJ09B0152-0300