33.4 Maximum Clock Frequencies
| Symbol | Description | Conditions | Max. | Units |
|---|---|---|---|---|
| fGCLKGEN0 / fGCLK_MAIN fGCLKGEN1 fGCLKGEN2 fGCLKGEN3 fGCLKGEN4 fGCLKGEN5 fGCLKGEN6 fGCLKGEN7 |
GCLK Generator Output Frequency | Undivided | 48 | |
| Divided | 32 | MHz |
| Symbol | Description | Max. | Units |
|---|---|---|---|
| fCPU | CPU clock frequency | 32 | MHz |
| fAHB | AHB clock frequency | 32 | MHz |
| fAPBA | APBA clock frequency | 32 | MHz |
| fAPBB | APBB clock frequency | 32 | MHz |
| fAPBC | APBC clock frequency | 32 | MHz |
| fGCLK_DFLL48M_REF | DFLL48M Reference clock frequency | 35.1 | kHz |
| fGCLK_WDT | WDT input clock frequency | 48 | MHz |
| fGCLK_RTC | RTC input clock frequency | 48 | MHz |
| fGCLK_EIC | EIC input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_0 | EVSYS channel 0 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_1 | EVSYS channel 1 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_2 | EVSYS channel 2 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_3 | EVSYS channel 3 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_4 | EVSYS channel 4 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_5 | EVSYS channel 5 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_6 | EVSYS channel 6 input clock frequency | 48 | MHz |
| fGCLK_EVSYS_CHANNEL_7 | EVSYS channel 7 input clock frequency | 48 | MHz |
| fGCLK_SERCOMx_SLOW | Common SERCOM slow input clock frequency | 48 | MHz |
| fGCLK_SERCOM0_CORE | SERCOM0 input clock frequency | 48 | MHz |
| fGCLK_SERCOM1_CORE | SERCOM1 input clock frequency | 48 | MHz |
| fGCLK_SERCOM2_CORE | SERCOM2 input clock frequency | 48 | MHz |
| fGCLK_SERCOM3_CORE | SERCOM3 input clock frequency | 48 | MHz |
| fGCLK_SERCOM4_CORE | SERCOM4 input clock frequency | 48 | MHz |
| fGCLK_SERCOM5_CORE | SERCOM5 input clock frequency | 48 | MHz |
| fGCLK_TC0, GCLK_TC1 | TC0,TC1 input clock frequency | 48 | MHz |
| fGCLK_TC2, GCLK_TC3 | TC2,TC3 input clock frequency | 48 | MHz |
| fGCLK_TC4, GCLK_TC5 | TC4,TC5 input clock frequency | 48 | MHz |
| fGCLK_TC6, GCLK_TC7 | TC6,TC7 input clock frequency | 48 | MHz |
| fGCLK_ADC | ADC input clock frequency | 48 | MHz |
| fGCLK_AC_DIG | AC digital input clock frequency | 48 | MHz |
| fGCLK_AC_ANA | AC analog input clock frequency | 64 | kHz |
| fGCLK_DAC | DAC input clock frequency | 48 | MHz |
| fGCLK_PTC | PTC input clock frequency | 48 | MHz |