Datasheet

Section 10 Serial Communication Interface
Rev. 6.00 Aug 04, 2006 page 388 of 680
REJ09B0145-0600
Figure 10.14 shows an example of the operation when receiving in asynchronous mode.
1 frame
Start
bit
Start
bit
Receive
data
Receive
data
Parity
bit
Stop
bit
Parity
bit
Stop
bit
Mark state
(idle state)
1 frame
01 D0 D1 D7 0/1 1 0 10D0D1 D70/1
Serial
data
RDRF
FER
LSI
operation
User
p
rocessin
g
RDRF
cleared to 0
RDR data read Framing error
p
rocessin
g
RXI request 0 start bit
detected
ERI request in
response to
framing error
Figure 10.14 Example of Operation when Receiving in Asynchronous Mode
(8-bit data, parity, 1 stop bit)
3. Operation in Synchronous Mode
In synchronous mode, SCI3 transmits and receives data in synchronization with clock pulses. This
mode is suitable for high-speed serial communication.
SCI3 has separate transmission and reception units, allowing full-duplex communication with a
shared clock.
As the transmission and reception units are both double-buffered, data can be written during
transmission and read during reception, making possible continuous transmission and reception.