tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 230

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

16.6 Transfer Data Format
16. Asynchronous Serial Interface (UART)
RA001
Figure 16-3 Example of Infrared Data Format (Comparison between Normal Output and IrDA
16.6 Transfer Data Format
16.7 Infrared Data Format Transfer Mode
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>.
Setting UART0CR1<IRDASEL> to "1" allows the TXD0 pin to output data in the infrared data format.
The UART transfers data composed of the following four elements. The data from the start bit to the stop bit is col-
Figure 16-2 shows the transfer data format.
The TXD0 pin can output data in the infrared data format (IrDA) by the setting of the IrDA output control register.
• 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)
PE
0
0
1
1
STBT
0
1
0
1
UART output
IrDA output
Start
Start
Start
Start
1
Bit 0
Bit 0
Bit 0
Bit 0
2
Figure 16-2 Transfer Data Format
Bit 1
Bit 1
Bit 1
Bit 1
3
Start bit
Bit width
3/16
Bit 2
Bit 2
Bit 2
Bit 2
4
D0
Output)
Page 216
Bit 3
Bit 3
Bit 3
Bit 3
5
Transfer frame
D1
Bit 4
Bit 4
Bit 4
Bit 4
6
D2
Bit 5
Bit 5
Bit 5
Bit 5
7
Bit 6
Bit 6
Bit 6
Bit 6
8
D7
Bit 7
Bit 7
Bit 7 Parity
Bit 7
9
Stop bit
Stop 1
Stop 1 Stop 2
Parity
10
Stop 1
Stop 1 Stop 2
11
12
TMP89FM42