Datasheet

78K0/Ix2 CHAPTER 14 SERIAL INTERFACE UART6/DALI
R01UH0010EJ0500 Rev.5.00 448
Feb 28, 2012
(2) Communication operation
(a) Format and waveform example of normal transmit/receive data
Figures 14-15 and 14-16 show the format and waveform example of the normal transmit/receive data.
Figure 14-15. Format of Normal UART Transmit/Receive Data
1. LSB-first transmission/reception
Start
bit
Parity
bit
D0 D1 D2 D3 D4
1 data frame
Character bits
D5 D6 D7 Stop bit
2. MSB-first transmission/reception
Start
bit
Parity
bit
D7 D6 D5 D4 D3
1 data frame
Character bits
D2 D1 D0 Stop bit
One data frame consists of the following bits.
 Start bit ... 1 bit
 Character bits ... 7 or 8 bits
 Parity bit ... Even parity, odd parity, 0 parity, or no parity
 Stop bit ... 1 or 2 bits
The character bit length, parity, and stop bit length in one data frame are specified by UART/DALI operation
mode register 6 (ASIM6).
Whether data is communicated with the LSB or MSB first is specified by bit 1 (DIR6) of LIN operation control
register 6 (ASICL6).
Whether the T
XD6 pin outputs normal or inverted data is specified by bit 0 (TXDLV6) of ASICL6.