HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 423
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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13.3.4
In synchronous mode, the SCI transmits and receives data in synchronization with clock pulses.
This mode is suitable for high-speed serial communication.
The SCI transmitter and receiver share the same clock but are otherwise independent, so full
duplex communication is possible. The transmitter and receiver are also double buffered, so
continuous transmitting or receiving is possible by reading or writing data while transmitting or
receiving is in progress.
Figure 13.14 shows the general format in synchronous serial communication.
Figure 13.13 Example of SCI Receive Operation (Own ID Matches Data) (8-Bit Data with
RDRF
Serial
MPIE
value
MPB
RDR
data
Synchronous Operation
1
Start
(multiprocessor
bit
0
RXI request,
MPIE = 0
interrupt)
D
0
ID1
Multiprocessor Bit and One Stop Bit) (cont)
D
Data ID2
1
D
7
handler reads data
in RDR and clears
MPB
RXI interrupt
1
RDRF to 0
Stop
bit
1
Section 13 Serial Communication Interface (SCI)
Start
bit
0
D
Rev. 7.00 Jan 31, 2006 page 397 of 658
ID2
0
received at each RXI
Own ID, so receving
continues, with data
D
1
Data 2
D
7
MPB
0
REJ09B0272-0700
Stop
bit
1
Idle (mark)
bit is again
set to 1
Data2
MPIE
state
1
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