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| PartNumber | AT91SAM7S256D-AU | AT91SAM7S256C-AU-999 | AT91SAM7S256C-MU-999 |
| Description | ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU | ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU | ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | LQFP-64 | LQFP-64 | LQFP-48 |
| Series | SAM7S/SE | SAM7S/SE | SAM7S/SE |
| Core | ARM7TDMI | ARM7TDMI | ARM7TDMI |
| Data Bus Width | 32 bit/16 bit | 32 bit/16 bit | 32 bit/16 bit |
| Maximum Clock Frequency | 55 MHz | 55 MHz | 55 MHz |
| Program Memory Size | 256 kB | 256 kB | 256 kB |
| Data RAM Size | 64 kB | 64 kB | 64 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 32 I/O | 32 I/O | 32 I/O |
| Operating Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Reel | Reel |
| Height | 1.6 mm | - | - |
| Length | 7 mm | - | - |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 7 mm | - | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | RAM | RAM | RAM |
| Interface Type | I2C, SPI, USART, USB | I2C, SPI, USART, USB | I2C, SPI, USART, USB |
| Analog Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| I/O Voltage | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 8 Channel | 8 Channel | 8 Channel |
| Number of Timers/Counters | 3 x 16 bit | 3 x 16 bit | 3 x 16 bit |
| Processor Series | SAM7S | SAM7S | SAM7S |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 1500 | 3500 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 1.95 V | 1.95 V | 1.95 V |
| Supply Voltage Min | 1.65 V | 1.65 V | 1.65 V |
| Watchdog Timers | Watchdog Timer | Watchdog Timer | Watchdog Timer |
| Unit Weight | 0.012088 oz | 0.012088 oz | 0.006409 oz |