AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 176

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

18.9.25
Name:
Access:
Offset:
• CD[15:0]: Clock divisor
This register has no effect if synchronous mode is selected with an external clock.
Notes:
176
2 to 65535
CD[15:0]
31
23
15
0
1
–
–
7
1. In synchronous mode, the value programmed must be even to ensure a 50:50 mark/space ratio.
2. CD = 1 must not be used when internal clock (CORECLK) is selected (i.e., USCLKS[1:0] = 00
AT91SAM7A1
USART Baud Rate Generator Register
US_BRGR
Read/Write
0x088
Action
Disables clock
Clock divider bypassed
Baud Rate (Asynchronous Mode) = Selected clock/(16 x CD)
Baud Rate (Synchronous Mode) = Selected clock/CD
30
22
14
–
–
6
29
21
13
–
–
5
28
20
12
–
–
4
CD[15:8]
CD[7:0]
27
19
11
–
–
3
26
18
10
–
–
2
b
).
25
17
–
–
9
1
6048B–ATARM–29-Jun-06
24
16
–
–
8
0