AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 633

• 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

Two workarounds are possible.
1. Either do not use the Watchdog Timer with the Watchdog fault Interrupt enabled (WDFIEN set at 1),
2. or set WDD to 0xFFF and in addition use only one of the following values for WDV: 0xFFF, 0xDFF, 0xBFF,
Problem Fix/Workaround
0x9FF, 0x7FF, 0x77F, 0x6FF, 0x67F, 0x5FF, 0x57F, 0x4FF, 0x47F, 0x3FF, 0x37F, 0x2FF, 0x27F, 0x1FF,
0x1BF, 0x17F, 0x13F, 0x0FF, 0x0DF, 0x0BF, 0x09F, 0x07F, 0x06F, 0x05F, 0x04F, 0x03F, 0x037, 0x02f,
0x027, 0x01F, 0x01B, 0x017, 0x013 and 0x00F.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
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