at75c220 ATMEL Corporation, at75c220 Datasheet - Page 85

• Manufacturer Part Number: at75c220
• Description: Smart Internet Appliance Processor Siap
• Manufacturer: ATMEL Corporation

USART Mode Register
Name:
Access Type:Read/write
Reset Value:0x0
•
•
•
•
USCLKS: Clock Selection (Baud Rate Generator Input Clock)
CHRL: Character Length
SYNC: Synchronous Mode Select
PAR: Parity Type
0
0
0
0
1
1
Start, stop and parity bits are added to the character length.
0 = USART operates in asynchronous mode.
1 = USART operates in synchronous mode.
0
0
1
0
0
1
1
31
23
15
–
–
7
USCLKS
CHRL
PAR
CHMODE
0
0
1
1
0
1
CHRL
US_MR
X
0
1
0
1
0
1
0
1
0
1
x
x
30
22
14
–
–
6
Selected Clock
ACLK
ACLK/8
External (SCK)
Character Length
Five bits
Six bits
Seven bits
Eight bits
Parity Type
Even parity
Odd parity
Parity forced to 0 (space)
Parity forced to 1 (mark)
No parity
Multi-drop mode
29
21
13
–
–
5
NBSTOP
USCLKS
28
20
12
–
–
4
27
19
11
–
–
3
–
CLKO
PAR
26
18
10
–
2
–
MODE9
25
17
–
9
1
–
SYNC
24
16
–
–
8
0
–
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