hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 405

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Figure 10.5 shows an example of a flowchart for initializing SCI3.
SCR3, and set bits
MPIE, and TEIE in
Clear bits TE and
Set bits TIE, RIE,
Set data transfer
Set value in BRR
Set bit SPC32 to
RE to 0 in SCR3
Has 1-bit period
Set bits CKE1
format in SMR
RE or TE to 1
1 in SPCR
and CKE0
elapsed?
in SCR3
Start
End
Yes
Figure 10.5 Example of SCI3 Initialization Flowchart
Wait
[1]
[2]
[3]
[4]
No
[1]
[2]
[3]
[4]
Set clock selection in SCR3. Be sure to
clear the other bits to 0. If clock output
is selected in asynchronous mode, the
clock is output immediately after setting
bits CKE1 and CKE0. If clock output is
selected for reception in synchronous
mode, the clock is output immediately
after bits CKE1, CKE0, and RE are
set to 1.
Set the data transfer format in the serial
mode register (SMR).
Write the value corresponding to the
transfer rate in BRR. This operation is
not necessary when an external clock
is selected.
Wait for at least one bit period, then set
bits TIE, RIE, MPIE, and TEIE in SCR3,
and set bits RE or TE to 1 in SCR3.
Setting bits TE and RE enables the TXD
and RXD
mode the mark state is established when
transmitting, and the idle state waiting for
a start bit when receiving.
Section 10 Serial Communication Interface
Rev. 7.00 Mar 10, 2005 page 363 of 652
32
pins to be used. In asynchronous
REJ09B0042-0700
32