AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 92

• 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: -

14.5.1
Name:
Access:
Address:
• SWRST: WT Software Reset
0: No effect.
1: Reset the WT.
A software triggered hardware reset of the WT is performed. It resets all the registers.
• SECSEN: WT Seconds Counter Enable
0: No effect.
1: Enables the WT seconds counter.
• SECSDIS: WT Seconds Counter Disable
0: No effect.
1: Disables the WT seconds counter.
In case both SECSEN and SECSDIS are equal to one when the control register is written, the WT seconds counter is
disabled.
• ALARMEN: WT Alarm Enable
0: No effect.
1: Enables the WT alarm.
• ALARMDIS: WT Alarm Disable
0: No effect.
1: Disables the WT alarm.
In case both ALARMEN and ALARMDIS are equal to one when the control register is written, the WT alarm is disabled.
92
31
23
15
–
–
–
7
–
AT91SAM7A1
WT Control Register
WT_CR
Write-only
0xFFFA4060
30
22
14
–
–
–
6
–
29
21
13
–
–
–
5
–
ALARMDIS
28
20
12
–
–
–
4
ALARMEN
27
19
11
–
–
–
3
SECSDIS
26
18
10
–
–
–
2
SECSEN
25
17
–
–
9
–
1
6048B–ATARM–29-Jun-06
SWRST
24
16
–
–
8
–
0