Datasheet

871
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
38.6 Product Dependencies
38.6.1 I/O Lines
The pins used for interfacing the High Speed MultiMedia Cards or SD Cards are multiplexed with PIO lines. The
programmer must first program the PIO controllers to assign the peripheral functions to HSMCI pins.
38.6.2 Power Management
The HSMCI is clocked through the Power Management Controller (PMC), so the programmer must first configure the
PMC to enable the HSMCI clock.
38.6.3 Interrupt
The HSMCI interface has an interrupt line connected to the interrupt controller.
Handling the HSMCI interrupt requires programming the interrupt controller before configuring the HSMCI.
38.7 Bus Topology
Figure 38-3. High Speed MultiMedia Memory Card Bus Topology
Table 38-2. I/O Lines
Instance Signal I/O Line Peripheral
HSMCI MCCDA PA28 C
HSMCI MCCK PA29 C
HSMCI MCDA0 PA30 C
HSMCI MCDA1 PA31 C
HSMCI MCDA2 PA26 C
HSMCI MCDA3 PA27 C
Table 38-3. Peripheral IDs
Instance ID
HSMCI 18
2345617
MMC
91011 12138