TMP89FS60 datasheet(230/410 Pages) TOSHIBA

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16. Asynchronous Serial Interface (UART)

16.6 Transfer Data Format

TMP89FS60

RA001

16.6 Transfer Data Format

The UART transfers data composed of the following four elements. The data from the start bit to the stop bit is col-

lectively defined as a "transfer frame". The start bit consists of 1 bit (L level) and the data consists of 8 bits. Parity

bits are determined by UART0CR1<PE> that selects the presence or absence of parity and UART0CR1<EVEN>

that selects even- or odd-numbered parity. The bit length of the stop bit can be selected at UART0CR1<STBT>.

Figure 16-2 shows the transfer data format.

• Start bit (1 bit)

• Data (8 bits)

• Parity bit (selectable from even-numbered, odd-numbered or no parity)

• Stop bit (selectable from 1 bit or 2 bits)

Figure 16-2 Transfer Data Format

16.7 Infrared Data Format Transfer Mode

The TXD0 pin can output data in the infrared data format (IrDA) by the setting of the IrDA output control register.

Setting UART0CR1<IRDASEL> to "1" allows the TXD0 pin to output data in the infrared data format.

Figure 16-3 Example of Infrared Data Format (Comparison between Normal Output and IrDA

Output)

Start

123456789

Bit 0

Stop 1

Start

Bit 0

Stop 1 Stop 2

Stop 1

Stop 1 Stop 2

Start

Bit 0

Start

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7 Parity

Parity

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

STBT

Transfer frame

UART output

IrDA output

Start bit

Stop bit

3/16

Bit width

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