Manual

AT75C310
63
USART Mode Register
Name: US_MR
Access Type: Read/write
• USCLKS: Clock Selection (Baud Rate Generator Input Clock)
• CHRL: Character Length
Start, stop and parity bits are added to the character length.
• SYNC: Synchronous Mode Select
0 = USART operates in asynchronous mode.
1 = USART operates in synchronous mode.
• PAR: Parity Type
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
–––––CLKO MODE9 –
15 14 13 12 11 10 9 8
CHMODE NBSTOP PAR SYNC
76543210
CHRL USCLKS ––––
USCLKS Selected Clock
00
ACLK
01
ACLK/8
1X
External (SCK)
CHRL Character Length
00
Five bits
01
Six bits
10
Seven bits
11
Eight bits
PAR Par ity Type
000
Even parity
001
Odd parity
010
Parity forced to 0 (space)
011
Parity forced to 1 (mark)
10x
No parity
11x
Multi-drop mode