AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 490

• 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

34.6.1
Register Name:
Access Type:
• DIVA, DIVB: CLKA, CLKB Divide Factor
• PREA, PREB
DIVA, DIVB
0
1
2-255
0
0
0
0
0
0
0
0
1
1
1
31
23
15
–
–
7
PWM Mode Register
PREA, PREB
0
0
0
0
1
1
1
1
0
0
0
Other
30
22
14
–
–
6
PWM_MR
Read/Write
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
29
21
13
–
–
5
CLKA, CLKB
CLKA, CLKB clock is turned off
CLKA, CLKB clock is clock selected by PREA, PREB
CLKA, CLKB clock is clock selected by PREA, PREB divided by DIVA, DIVB factor.
MCK.
MCK/2
MCK/4
MCK/8
MCK/16
MCK/32
MCK/64
MCK/128
MCK/256
MCK/512
MCK/1024
Reserved
28
20
12
–
–
4
DIVB
DIVA
27
19
11
3
Divider Input Clock
26
18
10
2
SAM7S Series [DATASHEET]
PREB
PREA
6175M–ATARM–26-Oct-12
25
17
9
1
24
16
8
0
490