Uart Transmit/Receive Data Formats - Mitsubishi Electric M32R Series User Manual

Mitsubishi 32-bit risc single-chip microcomputers

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12.6.2 UART Transmit/Receive Data Formats

The transmit/receive data format during UART mode is determined by setting the SIO Transmit/

Receive Mode Register. Shown below is the transmit/receive data format that can be used in UART

Figure 12.6.1 Example of Transmit/Receive Data Format in UART Mode

Table 12.6.1 Transfer Data in UART Mode

ST (start bit)

D0-D8 (character bits)

PAR (parity bit)

SP (stop bit)

Transmit data

Data bits (8 bits)

Indicates the beginning of data transmission. This is a low signal of a one bit

duration, which is added immediately before the transmit data.

Transmit/receive data transferred via serial I/O. In UART mode, data in 7, 8, or

9 bits can be transmitted/received.

Added to the transmit/receive characters. When parity is enabled, parity is

automatically set in such a way that the number of 1's in characters including

the parity bit itself is always even or odd as selected by the even/odd parity

Indicates the end of data transmission, and is added immediately after

characters (or if parity enabled, immediately after the parity bit). The stop bit can

be chosen to be one bit or two bits long.

12.6 Transmit Operation in UART Mode