2 Peripheral Overview
The following table shows the peripheral overview of the entire AVR DD Family, but further documentation describes only the AVR64DD14/20 devices.
| Feature |
AVR16DD14 |
AVR16DD20 |
AVR16DD28 |
AVR16DD32 |
|---|---|---|---|---|
| Pins | 14 | 20 | 28 | 32 |
| Max. frequency (MHz) | 24 | 24 | 24 | 24 |
| 16-bit Timer/Counter type A (TCA) | 1 | 1 | 1 | 1 |
| 16-bit Timer/Counter type B (TCB) | 2 | 2 | 3 | 3 |
| 12-bit Timer/Counter type D (TCD) | 1 | 1 | 1 | 1 |
| Real-Time Counter (RTC) | 1 | 1 | 1 | 1 |
| USART | 2 | 2 | 2 | 2 |
| SPI | 1 | 1 | 1 | 1 |
| TWI/I2C(1) | 1(1) | 1(1) | 1(1) | 1(1) |
| 12-bit differential ADC (channels)(2) | 1 (7)(2) | 1 (13)(2) | 1 (19)(2) | 1 (23)(2) |
| 10-bit DAC (outputs) | 1 (1) | 1 (1) | 1 (1) | 1 (1) |
| Analog Comparator (AC) | 1 | 1 | 1 | 1 |
| Zero-Cross Detector (ZCD) | 1 | 1 | 1 | 1 |
| Configurable Custom Logic Look-up Table (CCL LUT) | 4 | 4 | 4 | 4 |
| Watchdog Timer (WDT) | 1 | 1 | 1 | 1 |
| Event System (EVSYS) channels | 6 | 6 | 6 | 6 |
| General Purpose I/O(3) | 11/10(3) | 17/16(3) | 23/22(3) | 27/26(3) |
| PORT |
PA[1:0] |
PA[7:0] |
PA[7:0] |
PA[7:0] |
| External interrupts | 11 | 17 | 23 | 27 |
| CRCSCAN | 1 | 1 | 1 | 1 |
| Unified Program and Debug Interface (UPDI) | 1 | 1 | 1 | 1 |
Note:
- The TWI/I2C can operate simultaneously as both host and client on different pins.
- ADC inputs are available on MVIO pins (PORTC) if the MVIO is disabled in the SYSCFG1.MVSYSCFG fuse setting.
- PF6/RESET pin is input only.