AT91M40800-33AI Atmel, AT91M40800-33AI Datasheet - Page 110

• Manufacturer Part Number: AT91M40800-33AI
• Description: IC ARM7 MCU 100 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M40800-33AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

USART Mode Register
Name:
Access Type:Read/Write
Reset Value: 0
Offset:
•
•
Start, stop and parity bits are added to the character length.
• SYNC: Synchronous Mode Select (Code Label US_SYNC)
0 = USART operates in Asynchronous Mode.
1 = USART operates in Synchronous Mode.
110
USCLKS: Clock Selection (Baud Rate Generator Input Clock)
CHRL: Character Length
31
23
15
–
–
7
0
0
1
0
0
1
1
AT91X40 Series
CHMODE
USCLKS
CHRL
CHRL
US_MR
0x04
30
22
14
–
–
6
X
0
1
0
1
0
1
Selected Clock
MCK
MCK/8
External (SCK)
Character Length
Five bits
Six bits
Seven bits
Eight bits
29
21
13
–
–
5
NBSTOP
USCLKS
28
20
12
–
–
4
27
19
11
–
–
–
3
CLKO
PAR
26
18
10
–
2
–
US_CLKS_MCK8
US_CLKS_MCK
US_CLKS_SCK
MODE9
Code Label
Code Label
US_CHRL_5
US_CHRL_6
US_CHRL_7
US_CHRL_8
US_CLKS
US_CHRL
25
17
–
9
1
–
1354D–ATARM–08/02
SYNC
24
16
–
–
–
8
0