AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 582

• 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

37.10.3
The maximum operating frequency is given in
cessor is fetching code out of it.
the MC_FMR register. This field defines the number of wait states required to access the Embedded Flash Memory.
Table 37-24.
Notes:
Table 37-25. AC Flash Characteristics
Parameter
Program Cycle Time
Full Chip Erase
1. FWS = Flash Wait States
2. It is not necessary to use 2 or 3 wait states because the flash can operate at maximum frequency with only 1 wait state.
Embedded Flash Characteristics
FWS
Embedded Flash Wait States
2
3
0
1
(2)
(2)
(1)
Conditions
per page including auto-erase
per page without auto-erase
Table 37-24
Read Operations
gives the device maximum operating frequency depending on the FWS field of
2 cycles
3 cycles
4 cycles
Table 37-24
1 cycle
but is limited by the Embedded Flash access time when the pro-
Maximum Operating Frequency (MHz)
Min
15
SAM7S Series [DATASHEET]
30
55
55
55
6175M–ATARM–26-Oct-12
Max
6
3
Units
ms
ms
ms
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