r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1115
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r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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21.4.3
Clocked synchronous mode, in which data is transmitted or received in synchronization with clock
pulses, is suitable for fast serial communication.
Since the transmitter and receiver are independent units in the SCIF, full-duplex communication
can be performed by sharing the clock. Both the transmitter and receiver have a 64-stage FIFO
buffer structure, so that data can be read or written during transmission or reception, enabling
continuous data transmission or reception.
Figure 21.15 shows the general format for clocked synchronous communication.
In clocked synchronous serial communication, data on the communication line is output from one
fall of the synchronization clock to the next fall. Data is guaranteed to be accurate at the start of
the synchronization clock.
In serial communication, each character is output starting with the LSB and ending with the MSB.
After the MSB is output, the communication line remains in the state of the last data.
In clocked synchronous mode, the SCIF receives data in synchronization with the rise of the
synchronization clock.
Synchronization
clock
Serial data
Note: * High except in continuous transfer
Operation in Clocked Synchronous Mode
Don't care
*
Figure 21.15 Data Format in Clocked Synchronous Communication
LSB
Bit 0
Bit 1
One unit of transfer data (character or frame)
Bit 2
Bit 3
21. Serial Communication Interface with FIFO (SCIF)
Bit 4
Rev.1.00 Jan. 10, 2008 Page 1085 of 1658
Bit 5
Bit 6
REJ09B0261-0100
Bit 7
MSB
Don't care
*
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