UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 250

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

12.4.3 Infrared data transfer mode
248
Caution The infrared data transfer mode can only be used with UART00.
In the infrared data transfer mode, pulses can be output and received in the following data format.
Remark The SIR standard is not supported (negotiation at 9,600 bps cannot be performed).
(1) Data format
Figure 12-16 shows the data format of the infrared data transfer mode in comparison with the data format in
UART mode.
The IR frame corresponds to the bit string of the UART frame that consists of a start bit, 8 data bits and 1
stop bit.
The length of the electrical pulse transmitted or received in the IR frame is 3/16 of a 1-bit cycle. The pulse
3/16 of a 1-bit cycle rises in the middle of the bit cycle (refer to the figure below).
Figure 12-16. Comparison of Data Format in Infrared Data Transfer Mode and UART Mode
Bit time
Start
Start
bit
bit
0
0
D0
1
1
CHAPTER 12 SERIAL INTERFACES UART00 AND UART01
D1
0
0
D2
1
1
User’s Manual U13029EJ7V1UD
Pulse width = 3/16 bit time
D3
UART frame
0
0
IR frame
Data bit
Data bit
Bit time
D4
0
0
D5
1
1
Pulse width = 3/16 bit time
D6
1
1
D7
0
0
Stop
Stop
bit
bit
1
1