AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 108

• 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

Figure 19-4. Code Read Optimization in Thumb Mode for FWS = 3
Note:
ARM Request (16-bit)
Buffer (32 bits)
Flash Access
Data To ARM
Master Clock
When FWS is equal to 2 or 3, in case of sequential reads, the first access takes FWS cycles, the second access one cycle, the
third access FWS cycles, the fourth access one cycle, etc.
Code Fetch
@Byte 0
3 Wait State Cycles
Bytes 0-3
@2
0-1
3 Wait State Cycles
@4
2-3
Bytes 0-3
Bytes 4-7
@6
4-5
3 Wait State Cycles
@8
6-7
Bytes 8-11
Bytes 4-7
SAM7S Series [DATASHEET]
@10
8-9 10-11
3 Wait State Cycles
6175M–ATARM–26-Oct-12
@12
Bytes 12-15
Bytes 8-11
12-13
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