h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 503
h8s-2169
Manufacturer Part Number
h8s-2169
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2169.pdf
(1075 pages)
- Current page: 503 of 1075
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15.3.4
In 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 15.14 shows the general format for synchronous serial communication.
In synchronous serial communication, data on the transmission line is output from one falling edge
of the serial clock to the next. Data is guaranteed valid at the rising edge of the serial clock.
In synchronous 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 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.
Serial
clock
Serial
data
Note: * High except in continuous transfer
Operation in Synchronous Mode
Don’t care
*
Figure 15.14 Data Format in Synchronous Communication
LSB
Bit 0
Bit 1
One unit of transfer data (character or frame)
Bit 2
Section 15 Serial Communication Interface (SCI, IrDA)
Bit 3
Bit 4
Rev. 3.00 Jan 18, 2006 page 475 of 1044
Bit 5
Bit 6
MSB
Bit 7
REJ09B0280-0300
Don’t care
*
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