AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 219

• 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: -

21.6.18
Name:
Access:
Address:
• PRESCALX[3:0]: Counter Clock Prescalar for PWM Channel X
Note:
• PLX: Pulse Level for PWM Channel X
0: The pulses are at logic level 0. During the delay, the output is at logic level 1.
1: The pulses are at logic level 1. During the delay, the output is at logic level 0.
Note:
21.6.19
Name:
Access:
Address:
• PSTAX: Pulse Start Interrupt
0: No effect.
1: Clears the PSTA interrupt.
• PENDX: Pulse End Interrupt
0: No effect.
1: Clears the PEND interrupt.
Note:
6048B–ATARM–29-Jun-06
PEND3
31
23
15
31
23
15
–
–
–
7
–
–
–
7
“X” indicates that the bit concerns the PWMX.
When pulse level changes, a pulse start or a pulse end is detected, and the corresponding bit is set in the status register (gen-
erating an interrupt if enabled).
“X” indicates that the bit concerns the PWMX.
PWM Mode Register
PWM Clear Status Register
Write-only
PWM_MR
Read/Write
0xFFFD0064
PWM_CSR
0xFFFD006C
Counter Clock Frequency
PSTA3
30
22
14
30
22
14
–
–
–
6
–
–
–
6
PEND2
29
21
13
29
21
13
–
–
–
5
–
–
–
5
=
CORECLK
PSTA2
PL3
PL2
PL1
PL0
28
20
12
28
20
12
4
–
–
–
4
2
PRESCALAR1
PEND1
27
19
11
27
19
11
3
–
–
–
3
PSTA1
26
18
10
26
18
10
2
–
–
–
2
PRESCAL3
PRESCAL2
PRESCAL1
PRESCAL0
PEND0
AT91SAM7A1
25
17
25
17
9
1
–
–
9
–
1
PSTA0
24
16
24
16
8
0
–
–
8
–
0
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