NEC V850E/MA1 User Manual page 370

11.2.5 Operation
(1) Data format
Full-duplex serial data transmission and reception can be performed.
The transmit/receive data format consists of one data frame containing a start bit, character bits, a parity bit,
and stop bits as shown in Figure 11-2.
The character bit length within one data frame, the type of parity, and the stop bit length are specified by the
asynchronous serial interface mode register n (ASIMn) (n = 0 to 2).
Also, data is transferred with the least significant bit (LSB) first.
Figure 11-2. Asynchronous Serial Interface Transmit/Receive Data Format
Start
• Start bit ··· 1 bit
• Character bits ··· 7 bits or 8 bits
• Parity bit ··· Even parity, odd parity, 0 parity, or no parity
• Stop bits ··· 1 bit or 2 bits
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CHAPTER 11 SERIAL INTERFACE FUNCTION
D0 D1 D2 D3
bit
Character bits
User's Manual U14359EJ4V0UM
1 data frame
Parity
D4 D5 D6 D7
Stop bits
bit