r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 590
r5f71374an80fpv
Manufacturer Part Number
r5f71374an80fpv
Description
32-bit Risc Microcomputer Superh?? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F71374AN80FPV.pdf
(1154 pages)
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Section 14 Serial Communication Interface (SCI)
14.4
14.4.1
For serial communication, the SCI has an asynchronous mode in which characters are
synchronized individually, and a clock synchronous mode in which communication is
synchronized with clock pulses.
Asynchronous or clock synchronous mode is selected and the transmit format is specified in the
serial mode register (SCSMR) as shown in table 14.13. The SCI clock source is selected by the
combination of the C/A bit in SCSMR and the CKE1 and CKE0 bits in the serial control register
(SCSCR) as shown in table 14.14.
Asynchronous Mode
• Data length is selectable: 7 or 8 bits.
• Parity bit is selectable. So is the stop bit length (1 or 2 bits). The combination of the preceding
• In receiving, it is possible to detect framing errors, parity errors, overrun errors, and breaks.
• An internal or external clock can be selected as the SCI clock source.
Clock Synchronous Mode
• The transmission/reception format has a fixed 8-bit data length.
• In receiving, it is possible to detect overrun errors.
• An internal or external clock can be selected as the SCI clock source.
Rev. 1.00 Sep. 21, 2007 Page 564 of 1124
REJ09B0402-0100
selections constitutes the communication format and character length.
When an internal clock is selected, the SCI operates using the clock supplied by the on-
When an external clock is selected, the external clock input must have a frequency 16 times
When an internal clock is selected, the SCI operates using the on-chip baud rate generator,
When an external clock is selected, the SCI operates on the input serial clock. The on-chip
chip baud rate generator and can output a clock with a frequency 16 times the bit rate.
the bit rate. (The on-chip baud rate generator is not used.)
and outputs a serial clock signal to external devices.
baud rate generator is not used.
Operation
Overview
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