HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 434

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Serial Communication Interface (SCI)
13.3.4
In the clock 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 are independent, so full duplex communication is possible while
sharing the same clock. 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 13.16 shows the general format in clock synchronous serial communication.
Rev. 5.00 Jan 06, 2006 page 414 of 818
REJ09B0273-0500
RDRF
Example: Own ID matches data, 8-bit data with multiprocessor bit and one stop bit
Serial
MPIE
value
MPB
RDR
data
RxI interrupt request
interrupt), MPIE = 0
Clock Synchronous Operation
(multiprocessor
1
Figure 13.15 Example of SCI Receive Operation (ID Matches)
Start
bit
0
D0
(ID2)
Data
ID1
D1
and clears RDRF to 0
RxI interrupt handler
reads data in RDR
D7
MPB
1
Stop
bit
1
Start
bit
0
interrupt processing routine
D0
(data 2)
Station’s ID, so receiving
ID2
Data
continues, with data
received by the RxI
D1
D7
MPB
0
Stop
bit
1
(marking)
bit is again
set to 1
Data2
MPIE
Idling
1