Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
564
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
35.6
Product Dependencies
35.6.1 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.
The programmer must first program the PIO controllers to assign the peripheral functions to HSMCI pins.
35.6.2 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.
the PMC to enable the HSMCI clock.
35.6.3 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.
35.7
Bus Topology
Figure 35-3. High Speed MultiMedia Memory Card Bus Topology
Table 35-2. I/O Lines
Instance
Signal
I/O Line
Peripheral
HSMCI
MCCDA
PA16
A
HSMCI
MCCK
PA17
A
HSMCI
MCDA0
PA15
A
HSMCI
MCDA1
PA18
A
HSMCI
MCDA2
PA19
A
HSMCI
MCDA3
PA20
A
HSMCI
MCDA4
PA11
B
HSMCI
MCDA5
PA12
B
HSMCI
MCDA6
PA13
B
HSMCI
MCDA7
PA14
B
Table 35-3. Peripheral IDs
Instance
ID
HSMCI
12
2 3 4 5 6
1
7
MMC
9 10 11
1213 8