AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 348

• 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: -

26.11.8
Name:
Access:
Offset:
• CV[15:0]: Counter Value
These 16 bits contain the counter value in real time.
The maximal counter value is 0xFFFF = 65535.
When a trigger occurs, the counter will be reset to 0x0000 at the next valid counter clock edge.
26.11.9
Name:
Access:
Offset:
• RA[15:0]: Register A Value
This register is loaded with the current counter value when a valid edge occurs on TIOAx pin.
This valid edge is defined by LDRA[1:0] of the mode register.
When this register is loaded, two events occur:
This register can not be loaded if the counter is stopped or the counter clock disabled.
348
– The LDRAS flag is set in the status register.
– If enabled, LDRAS interrupt is generated.
31
23
15
31
23
15
–
–
7
–
–
7
AT91SAM7A1
GPT Counter Value in Capture Mode
GPT Register A in Capture Mode
GPT_CV
Read-only
0x80
GPT_RA
Read-only
0x84
30
22
14
30
22
14
–
–
6
–
–
6
29
21
13
29
21
13
–
–
5
–
–
5
28
20
12
28
20
12
–
–
4
–
–
4
CV[15:8]
RA[15:8]
CV[7:0]
RA[7:0]
27
19
11
27
19
11
–
–
3
–
–
3
26
18
10
26
18
10
–
–
2
–
–
2
25
17
25
17
–
–
9
1
–
–
9
1
6048B–ATARM–29-Jun-06
24
16
24
16
–
–
8
0
–
–
8
0