LAPIS Semiconductor ML610421, Руководство пользователя, Страница: 201 / 437

ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 14 UART
14 – 6
14.2.5 UART0 Mode Register 1 (UA0MOD1)
Address: 0F293H
Access: R/W
Access size: 8/16 bits
Initial value: 00H
7 6 5 4 3 2 1 0
UA0MOD1 — U0DIR U0NEG U0STP U0PT1 U0PT0 U0LG1 U0LG0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
UA0MOD1 is a special function register (SFR) to set the transfer mode of the UART.
[Description of Bits]
•
U0LG1, U0LG0 (bits 1, 0)
The U0LG1 and U0LG0 bits are used to specify the data length in the communication of the UART.
U0LG1 U0LG0 Description
0 0
8-bit length (initial value)
0 1
7-bit length
1 0
6-bit length
1 1
5-bit length
•
U0PT1, U0PT0 (bits 3, 2)
The U0PT1 and U0PT0 bits are used to select “even parity”, odd parith”, or “no parity” in the communication of the
UART.
U0PT1 U0PT0 Description
0 0 Even parity (initial value)
0 1 Odd parity
1 * No parity bit
•
U0STP (bit 4)
The U0STP bit is used to select the stop bit length in the communication of the UART.
U0STP Description
0 1 stop bit (initial value)
1 2 stop bits
•
U0NEG (bit 5)
The U0NEG bit is used to select positive logic or negative logic in the communication of the UART.
U0NEG Description
0 Positive logic (initial value)
1 Negative logic