Datasheet

43
AT32UC3A
12.4 Clock Connections
12.4.1 Timer/Counters
Each Timer/Counter channel can independently select an internal or external clock source for its
counter:
12.4.2 USARTs
Each USART can be connected to an internally divided clock:
9 0 Serial Peripheral Interface SPI0
10 0 Serial Peripheral Interface SPI1
11 0 Two-wire Interface TWI
12 0 Pulse Width Modulation Controller PWM
13 0 Synchronous Serial Controller SSC
14
0 Timer/Counter TC0
1 Timer/Counter TC1
2 Timer/Counter TC2
15 0 Analog to Digital Converter ADC
16 0 Ethernet MAC MACB
17 0 USB 2.0 OTG Interface USBB
18 0 SDRAM Controller SDRAMC
19 0 Audio Bitstream DAC DAC
Table 12-3. Interrupt Request Signal Map
Table 12-4. Timer/Counter clock connections
Source Name Connection
Internal TIMER_CLOCK1 32 KHz Oscillator
TIMER_CLOCK2 PBA clock / 2
TIMER_CLOCK3 PBA clock / 8
TIMER_CLOCK4 PBA clock / 32
TIMER_CLOCK5 PBA clock / 128
External XC0 See Section 12.7
XC1
XC2
Table 12-5. USART clock connections
USART Source Name Connection
0 Internal CLK_DIV PBA clock / 8
1
2
3
32058K
AVR32-01/12