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Microchip AT91SAM7S321-AU technical specifications.
| Access Time | 55us |
| Package/Case | LQFP |
| Core Architecture | ARM |
| Data Bus Width | 32b |
| Density | 32KB |
| Frequency | 55MHz |
| Height | 1.45mm |
| Interface | I2C, SPI, USB, I2S, UART, USART |
| Lead Free | Lead Free |
| Length | 10mm |
| Max Frequency | 55MHz |
| Max Operating Temperature | 85°C |
| Memory Size | 32KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Max Supply Voltage | 3.6V |
| Min Supply Voltage | 1.65V |
| Mount | Surface Mount |
| Number of ADC Channels | 8 |
| Number of Bits | 32 |
| Number of I/Os | 32 |
| Number of I2C Channels | 1 |
| Number of Programmable I/O | 32 |
| Number of PWM Channels | 4 |
| Number of SPI Channels | 1 |
| Number of Timers/Counters | 3 |
| Oscillator Type | Internal |
| Package Quantity | 160 |
| Packaging | Tray |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT, DMA |
| Radiation Hardening | No |
| RAM Size | 8KB |
| Reach SVHC Compliant | No |
| RoHS Compliant | Yes |
| Series | SAM7S |
| Watchdog Timer | Yes |
| Width | 10mm |
| RoHS | Compliant |
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