hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 411
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hd64338023s
Manufacturer Part Number
hd64338023s
Description
Renesas 8-bit Single-chip Microcomputer Super Low Power Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD64338023S.pdf
(697 pages)
- Current page: 411 of 697
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Figure 10.9 shows an example of the operation when receiving in asynchronous mode.
10.3.3
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.
Serial
data
RDRF
FER
LSI
operation
User
processing
Figure 10.9 Example of Operation when Receiving in Asynchronous Mode
Operation in Synchronous Mode
1
Start
bit
0
D0
D1
Receive
1 frame
data
D7
(8-Bit Data, Parity, 1 Stop Bit)
Parity
0/1
bit
RXI request
Stop
bit
1
Start
bit
0
D0
RDRF
cleared to 0
RDR data read
1 frame
Section 10 Serial Communication Interface
D1
Rev. 7.00 Mar 10, 2005 page 369 of 652
Receive
data
D7
Parity
0/1
bit
Stop
bit
0
0 start bit
detected
Mark state
(idle state)
REJ09B0042-0700
1
ERI request in
response to
framing error
Framing error
processing
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