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Chapter 15
Asynchronous Serial Interface C (UARTC)
User’s Manual U16580EE3V1UD00
15.5 Operation
15.5.1 Data
format
Full-duplex serial data reception and transmission is performed.
As shown in Figure 15-11, one data frame of transmit/receive data consists of a start bit, character bits,
parity bit, and stop bit(s).
Specification of the character bit length within 1 data frame, parity selection, specification of the stop bit
length, and specification of MSB/LSB-first transfer are performed using the UCnCTL0 register. UARTCn
features additionally the extension bit operation for a ninth transfer data bit, which can be specified in
the UCnOPT1 register.
Moreover, control of UART output/inverted output for the TXDCn bit is performed using the UCnTDL bit
of the UCnOPT0 register.
•
Start bit
1 bit
•
Character bits
7 bits/8 bits/9 bits
•
Parity bit
Even parity/odd parity/0 parity/no parity
Note
•
Stop bit
1 bit/2 bits
Note:
Extension bit operation presumes no parity setting.
Figure 15-11:
UARTC Transmit/Receive Data Format (1/2)
(a) 8-bit data length, LSB first, even parity, 1 stop bit, transfer data: 55H
(b) 8-bit data length, MSB first, even parity, 1 stop bit, transfer data: 55H
(c) 8-bit data length, MSB first, even parity, 1 stop bit, transfer data: 55H, TXDCn inversion
1 data frame
Start
bit
D0
D1
D2
D3
D4
D5
D6
D7
Parity
bit
Stop
bit
1 data frame
Start
bit
D7
D6
D5
D4
D3
D2
D1
D0
Parity
bit
Stop
bit
1 data frame
Start
bit
D7
D6
D5
D4
D3
D2
D1
D0
Parity
bit
Stop
bit
Содержание V850E/PH2
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
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