2 Peripheral Overview
The following table shows the peripheral overview of the entire AVR DU family.
| Feature |
AVR16DU14 |
AVR16DU20 |
AVR16DU28 |
AVR16DU32 |
|---|---|---|---|---|
| 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 | 2 | 2 |
| Real-Time Counter (RTC) | 1 | 1 | 1 | 1 |
| USB 2.0 full-speed device | 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) |
| 10-bit ADC (channels) | 1 (5) | 1 (11) | 1 (17) | 1 (21) |
| Analog Comparator (AC) | 1 | 1 | 1 | 1 |
| Peripheral Touch Controller (PTC) | - | - | - | - |
| Operational amplifier (OP) | - | - | - | - |
| 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(2) | 9/8(2) | 15/14(2) | 21/20(2) | 25/24(2) |
| PORT | PA[1:0], PC[3], PD[7:4], PF[7:6] | PA[7:0], PC[3], PD[7:4], PF[7:6] | PA[7:0], PC[3], PD[7:0], PF[7,6,1,0] | PA[7:0], PC[3], PD[7:0], PF[7:0] |
| External interrupts | 9 | 15 | 21 | 25 |
| 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.
- PF6/RESET pin is input only.