
R01UH0336EJ0102 Rev.1.02
Page 1244 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 22 Synchronous/Asynchronous Serial Interface H (UARTH)
22.6 Operation
22.6.1
Data Formats
The interface handles full-duplex serial data reception and transmission.
As shown in the figures below, one frame of data for transmission or received
data consists of a start bit, the character bits, parity bit or bits, and stop bit or
bits.
Several properties of transmitted and received data frames can be specified by
control bits in the URTHnCTL1 register:
(1)
UARTHn Transmit/Receive Data Format
(a)
9-bit data length (extension bit), LSB first, even parity, 1 stop bit, data for
transfer: 155
H
(b)
9-bit data length (extension bit), MSB first, even parity, 1 stop bit, data for
transfer: 155
H
Table 22-29
Data Format Specification
Item
Options
Control Bits
Start bit
1 bit
Fixed
Character bits
7 bits/8 bits/9 bits
URTHnCTL1.URTHnCLG
Parity
Even parity/odd parity/0 parity/
no parity
URTHnCTL1.URTHnSLP[1:0]
Number of stop bits
1 bit/2 bits
URTHnCTL1.URTHnSLG
Data order
MSB first/LSB first
URTHnCTL1.URTHnSLD
Levels of transmitted
data
Inverted/not inverted
URTHnCTL1.URTHnTDL
Levels of received
data
Inverted/not inverted
URTHnCTL1.URTHnRDL
Start
bit
D0
D1
D2
D3
D4
D5
D6
D7
Extension
bit
Parity
bit
Stop bit
1 data frame
1 data frame
D7
D6
D5
D4
D3
D2
D1
D0
Start
bit
Extension
bit
Parity
bit
Stop bit