AT91SAM7A3-AU Atmel, AT91SAM7A3-AU Datasheet - Page 395

• Manufacturer Part Number: AT91SAM7A3-AU
• Description: IC ARM7 MCU FLASH 256K 100LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A3-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, MMC, SPI, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 62
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Controller Family/series: AT91SAM7xx
• No. Of I/o's: 62
• Ram Memory Size: 32KB
• Cpu Speed: 60MHz
• No. Of Timers: 3
• Rohs Compliant: Yes
• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 60 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 32 Bit
• Number Of Programmable I/os: 62
• Interface Type: CAN/SPI/I2S/TWI/USART/USB
• On-chip Adc: 2(8-chx10-bit)
• Number Of Timers: 3
• Processor Series: AT91SAMx
• Core: ARM7TDMI
• Data Ram Size: 32 KB
• Maximum Clock Frequency: 60 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM7A3-EK
• Minimum Operating Temperature: - 40 C
• Cpu Family: 91S
• Device Core Size: 32b
• Frequency (max): 60MHz
• Total Internal Ram Size: 32KB
• # I/os (max): 62
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: LQFP
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7A3-EK - KIT EVAL FOR AT91SAM7A3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

6042E–ATARM–14-Dec-06
Figure 32-4. Non Overlapped Center Aligned Waveforms
Note:
When center aligned, the internal channel counter increases up to CPRD and.decreases down
to 0. This ends the period.
When left aligned, the internal channel counter increases up to CPRD and is reset. This ends
the period.
Thus, for the same CPRD value, the period for a center aligned channel is twice the period for
a left aligned channel.
• the waveform duty cycle. This channel parameter is defined in the CDTY field of the
• the waveform polarity. At the beginning of the period, the signal can be at high or low
• the waveform alignment. The output waveform can be left or center aligned. Center
source clock and can be calculated:
By using the Master Clock (MCK) divided by an X given prescaler value
(with X being 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, or 1024). The resulting period formula
will be:
By using a Master Clock divided by one of both DIVA or DIVB divider, the formula
becomes, respectively:
PWM_CDTYx register.
If the waveform is left aligned then:
If the waveform is center aligned, then:
level. This property is defined in the CPOL field of the PWM_CMRx register. By default the
signal starts by a low level.
aligned waveforms can be used to generate non overlapped waveforms. This property is
defined in the CALG field of the PWM_CMRx register. The default mode is left aligned.
PWM0
PWM1
(
---------------------------------------- -
(
--------------------------------------------------- -
2
2
duty cycle
×
×
duty cycle
X CPRD
CPRD DIVA
MCK
1. See
×
MCK
×
No overlap
Figure 32-5 on page 397
=
)
=
(
------------------------------------------------------------------------------------------------------- -
(
---------------------------------------------------------------------------------------------------------------------- -
period 1 fchannel_x_clock
)
(
period 2 ⁄
or
Period
(
--------------------------------------------------- -
2 CPRD
–
×
⁄
) 1 fchannel_x_clock
MCK
–
period
×
⁄
(
DIVB
period 2 ⁄
for a detailed description of center aligned waveforms.
)
AT91SAM7A3 Preliminary
)
×
CDTY
×
CDTY
)
) )
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