M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 363
M30622MA-XXXFP
Manufacturer Part Number
M30622MA-XXXFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M30622MA-XXXFP.pdf
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UART
348
2.5 Clock-Asynchronous Serial I/O (UART)
Figure 2.5.1. Transmission/reception format
Table 2.5.1. Transmission data names and functions
2.5.1 Overview
ST (start bit)
DATA (character bits)
SP (stop bit)
PAR (parity bit)
UART handles communications by means of character-by-character synchronization. The transmission
side and the reception side are independent of each other, so full-duplex communication is possible. The
following is an overview of the clock-asynchronous serial I/O.
(1) Transmission/reception format
Figure 2.5.1 shows the transmission/reception format, and Table 2.5.1 shows the names and func-
tions of transmission data.
Name
Transfer data length : 7 bits
Transfer data length : 8 bits
Transfer data length : 9 bits
A 1-bit “L” signal to be added immediately before character bits.
This bit signals the start of data transmission.
A signal to be added immediately after character bits so as to increase data
reliability. The level of this signal so varies that the total number of 1's in
character bits and this bit always becomes even or odd depending on which
parity is chosen, even or odd.
Either 1-bit or 2-bit “H” signal to be added immediately after character bits (after
the parity bit if parity is checked). This / they signals the end of data
transmission.
Transmission data set in the UARTi transmit buffer register.
1ST – 7DATA
1ST – 7DATA
1ST – 7DATA – 1PAR – 1SP
1ST – 7DATA – 1PAR – 2SP
1ST – 8DATA
1ST – 8DATA
1ST – 8DATA – 1PAR – 1SP
1ST – 8DATA – 1PAR – 2SP
1ST – 9DATA
1ST – 9DATA
1ST – 9DATA – 1PAR – 1SP
1ST – 9DATA – 1PAR – 2SP
ST
DATA : Character bit (Transfer data)
PAR
SP
: Start bit
: Parity bit
: Stop bit
Function
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
1SP
2SP
1SP
2SP
1SP
2SP
Mitsubishi microcomputers
M16C / 62 Group
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