Mitsubishi Electric M32R Series User Manual page 570

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

ST : Start bit

D : Data bit

Clock-synchronous mode

7-bit UART mode

8-bit UART mode

9-bit UART mode

Note 1: Whether or not to add a parity bit is selectable.

Note 2: The stop bit can be one bit or two bits long as selected.

When transmitting

If the attribute (odd/even) of the number of 1's

included in data bits agrees with the selected

parityattribute, a 0 is added as parity bit. If the

attribute (odd/even) of the number of 1's included

in data bits does not agree with the selected

parity attribute, a 1 is added as parity bit.

Attribute of D7 + D6 + ... +D0

When it agrees with the

selected parity attribute,

PAR = 0 is added.

When it agrees with the

selected parity attribute,

PAR = 0 is added.

Note 1: Shown above is an example of data format in 8-bit UART mode.

Note 2: The data bit numbers (Dn) above indicate bit numbers in a data list, and not the register bit numbers (Dn).

Figure 12.2.4 Data Format when Parity is Enabled

PAR : Parity bit

Direction of transfer

12.2 Serial I/O Related Registers

: One frame equivalent

When receiving

Received data is checked to see if the number

of 1's included in its data bits and the parity bit

agrees with the parity attribute (known as parity

If the result of D7 + D6 + ... D0 + PAR does not

agree with the selected parity attribute, a parity

error is assumed.

Note 1 Note 2

Note 1 Note 2

Note 1 Note 2