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11090BS–ATARM–22-Oct-13
SAM3S8/SD8 Summary
10.17 Peripheral Signal Multiplexing on I/O Lines
The SAM3S8/SD8 features 2 PIO controllers on 64-pin versions (PIOA and PIOB) or 3 PIO con-
trollers on the 100-pin version (PIOA, PIOB and PIOC), that multiplex the I/O lines of the
peripheral set.
The SAM3S8/SD8 64-pin and 100-pin PIO Controllers control up to 32 lines. Each line can be
assigned to one of three peripheral functions: A, B or C. The multiplexing tables in the following
paragraphs define how the I/O lines of the peripherals A, B and C are multiplexed on the PIO
Controllers. The column “Comments” has been inserted in this table for the user’s own com-
ments; it may be used to track how pins are defined in an application.
Note that some peripheral functions which are output only, might be duplicated within the tables.
22 SSC X X Synchronous Serial Controller
23 TC0 X X Timer/Counter 0
24 TC1 X X Timer/Counter 1
25 TC2 X X Timer/Counter 2
26 TC3 X X Timer/Counter 3
27 TC4 X X Timer/Counter 4
28 TC5 X X Timer/Counter 5
29 ADC X X Analog To Digital Converter
30 DACC X X Digital To Analog Converter
31 PWM X X Pulse Width Modulation
32 CRCCU X X CRC Calculation Unit
33 ACC X X Analog Comparator
34 UDP X X USB Device Port
Table 10-3. Peripheral Identifiers (Continued)
Instance ID Instance Name NVIC Interrupt
PMC
Clock Control Instance Description
