AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 498

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

34.6.11
Register Name:
Access Type:
Only the first 16 bits (internal channel counter size) are significant.
• CPRD: Channel Period
If the waveform is left-aligned, then the output waveform period depends on the counter source clock and can be
calculated:
If the waveform is center-aligned, then the output waveform period depends on the counter 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,
– By using a Master Clock divided by one of both DIVA or DIVB divider, the formula becomes, respectively:
– By using the Master Clock (MCK) divided by an X given prescaler value (with X being 1, 2, 4, 8, 16, 32, 64, 128,
– By using a Master Clock divided by one of both DIVA or DIVB divider, the formula becomes, respectively:
31
23
15
7
256, 512, or 1024). The resulting period formula will be:
(
--------------------------------- -
(
-------------------------------------------- -
256, 512, or 1024). The resulting period formula will be:
(
--------------------------------------------
(
-------------------------------------------------------
X
CRPD
2
2
×
×
×
PWM Channel Period Register
MCK
X
CPRD
CPRD
MCK
MCK
×
MCK
×
CPRD
DIVA
)
×
DIVA
30
22
14
)
PWM_CPRD[0..X-1]
6
)
Read/Write
or
)
(
------------------------------------------------ -
CRPD
or
(
-------------------------------------------------------
2
MCK
×
×
CPRD
DIVAB
29
21
13
MCK
5
×
)
DIVB
)
28
20
12
4
CPRD
CPRD
CPRD
CPRD
27
19
11
3
26
18
10
2
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
25
17
9
1
24
16
8
0
498