h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 491
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 491 of 1165
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13.3
13.3.1
The SCI can carry out serial communication in two modes: asynchronous mode in which
synchronization is achieved character by character, and clocked synchronous mode in which
synchronization is achieved with clock pulses.
Selection of asynchronous or clocked synchronous mode and the transmission format is made
using SMR as shown in table 13.8. The SCI clock is determined by a combination of the C/A bit
in SMR and the CKE1 and CKE0 bits in SCR, as shown in table 13.9.
Asynchronous Mode
• Data length: Choice of 7 or 8 bits
• Choice of parity addition, multiprocessor bit addition, and addition of 1 or 2 stop bits (the
• Detection of framing, parity, and overrun errors, and breaks, during reception
• Choice of internal or external clock as SCI clock source
Clocked Synchronous Mode
• Transfer format: Fixed 8-bit data
• Detection of overrun errors during reception
• Choice of internal or external clock as SCI clock source
combination of these parameters determines the transfer format and character length)
When internal clock is selected:
When external clock is selected:
When internal clock is selected:
When external clock is selected:
The SCI operates on the baud rate generator clock and a clock with the same frequency as
the bit rate can be output
A clock with a frequency of 16 times the bit rate must be input (the on-chip baud rate
generator is not used)
The SCI operates on the baud rate generator clock and a serial clock is output off-chip
The on-chip baud rate generator is not used, and the SCI operates on the input serial clock
Operation
Overview
Section 13 Serial Communication Interface (SCI)
Rev. 5.00 Sep 22, 2005 page 465 of 1136
REJ09B0257-0500
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