AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 190

• 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: -

19.5.18
Name:
Access:
Offset:
• PRESCALAR[3:0]: Counter Clock Prescalar
• MEASMODE[1:0]: Measurement Mode
• OVERMODE: Overrun Mode
0: In case of an overrun, the capture stops writing on the Data Register.
1: In case of an overrun, the capture does not stop writing on the Data Register.
• ONESHOT: One Shot
0: The capture still captures a frame variation.
1: The module captures a frame variation and stops. To ask for another capture, the STARTCAPT bit has to be set at 1 in
CAPT_CR.
190
CAPTCLK Frequency
ONESHOT
31
23
15
–
–
–
7
AT91SAM7A1
CAPTURE Mode Register
0
1
1
CAPT_MR
Read/Write
0x064
OVERMODE
MEASMODE[1:0]
30
22
14
–
–
–
6
=
CORECLK
29
21
13
–
–
–
5
MEASMODE[1:0]
X
0
1
2
PRESCALAR 1
28
20
12
–
–
–
4
–
Measure
Measure between each edge (positive and negative)
Measure between positive edges
Measure between negative edges
27
19
11
–
–
–
3
26
18
10
–
–
–
2
PRESCALAR[3:0]
25
17
–
–
9
–
1
6048B–ATARM–29-Jun-06
24
16
–
–
8
–
0