Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
576
30.5 Pin Name List
30.6 Product Dependencies
30.6.1 I/O Lines
The pins used for interfacing the compliant external devices may be multiplexed with PIO lines.
Before using the SSC receiver, the PIO controller must be configured to dedicate the SSC receiver I/O lines to the
SSC peripheral mode.
Before using the SSC transmitter, the PIO controller must be configured to dedicate the SSC transmitter I/O lines
to the SSC peripheral mode.
30.6.2 Power Management
The SSC is not continuously clocked. The SSC interface may be clocked through the Power Management
Controller (PMC), therefore the programmer must first configure the PMC to enable the SSC clock.
30.6.3 Interrupt
The SSC interface has an interrupt line connected to the Nested Vector Interrupt Controller (NVIC). Handling
interrupts requires programming the NVIC before configuring the SSC.
All SSC interrupts can be enabled/disabled configuring the SSC Interrupt mask register. Each pending and
unmasked SSC interrupt will assert the SSC interrupt line. The SSC interrupt service routine can get the interrupt
origin by reading the SSC interrupt status register.
Table 30-1. I/O Lines Description
Pin Name Pin Description Type
RF Receiver Frame Synchro Input/Output
RK Receiver Clock Input/Output
RD Receiver Data Input
TF Transmitter Frame Synchro Input/Output
TK Transmitter Clock Input/Output
TD Transmitter Data Output
Table 30-2. I/O Lines
Instance Signal I/O Line Peripheral
SSC RD PB18 A
SSC RF PB17 A
SSC RK PB19 A
SSC TD PA16 B
SSC TF PA15 B
SSC TK PA14 B
Table 30-3. Peripheral IDs
Instance ID
SSC 26