H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 629

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

13.3.4
In clocked synchronous mode, data is transmitted or received in synchronization with clock
pulses, making it suitable for high-speed serial communication.
Inside the SCI, the transmitter and receiver are independent units, enabling full-duplex
communication by use of a common clock. Both the transmitter and the receiver also have a
double-buffered structure, so that data can be read or written during transmission or reception,
enabling continuous data transfer.
Figure 13.14 shows the general format for clocked synchronous serial communication.
In clocked synchronous serial communication, data on the transmission line is output from one
falling edge of the serial clock to the next. Data confirmation is guaranteed at the rising edge of
the serial clock.
In clocked serial communication, one character consists of data output starting with the LSB and
ending with the MSB. After the MSB is output, the transmission line holds the MSB state.
In clocked synchronous mode, the SCI receives data in synchronization with the rising edge of the
serial clock.
Data Transfer Format
A fixed 8-bit data format is used.
No parity or multiprocessor bits are added.
Operation in Clocked Synchronous Mode
Serial
clock
Serial
data
Note: * High except in continuous transfer
Don’t care
Figure 13.14 Data Format in Synchronous Communication
*
LSB
Bit 0
Bit 1
One unit of transfer data (character or frame)
Bit 2
Bit 3
Section 13 Serial Communication Interface (SCI)
Bit 4
Rev. 3.00 Sep 15, 2006 page 595 of 988
Bit 5
Bit 6
Bit 7
MSB
REJ09B0330-0300
Don’t care
*