HD64F2149 Datasheet, PDF(451/1035 Page) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HD64F2149 Datasheet, PDF (451/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

◁

Bit 5

PE

Description

0

Parity bit addition and checking disabled

(Initial value)

1

Parity bit addition and checking enabled*

Note: * When the PE bit is set to 1, the parity (even or odd) specified by the O/E bit is added to

transmit data before transmission. In reception, the parity bit is checked for the parity (even

or odd) specified by the O/E bit.

Bit 4âParity Mode (O/E): Selects either even or odd parity for use in parity addition and

checking.

The O/E bit setting is only valid when the PE bit is set to 1, enabling parity bit addition and

checking, in asynchronous mode. The O/E bit setting is invalid in synchronous mode, when parity

bit addition and checking is disabled in asynchronous mode, and when a multiprocessor format is

used.

Bit 4

O/E

Description

0

Even parity*1

(Initial value)

1

Odd parity*2

Notes: 1. When even parity is set, parity bit addition is performed in transmission so that the total

number of 1 bits in the transmit character plus the parity bit is even.

In reception, a check is performed to see if the total number of 1 bits in the receive

character plus the parity bit is even.

2. When odd parity is set, parity bit addition is performed in transmission so that the total

number of 1 bits in the transmit character plus the parity bit is odd.

In reception, a check is performed to see if the total number of 1 bits in the receive

character plus the parity bit is odd.

Bit 3âStop Bit Length (STOP): Selects 1 or 2 bits as the stop bit length in asynchronous mode.

The STOP bit setting is only valid in asynchronous mode. If synchronous mode is set the STOP

bit setting is invalid since stop bits are not added.

Bit 3

STOP

Description

0

1 stop bit*1

(Initial value)

1

2 stop bits*2

Notes: 1. In transmission, a single 1 bit (stop bit) is added to the end of a transmit character

before it is sent.

2. In transmission, two 1 bits (stop bits) are added to the end of a transmit character

before it is sent.

417

▷