SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 826

• Manufacturer Part Number: SAM3SD8B
• Manufacturer: Atmel Corporation

34.6
34.6.1
34.6.2
34.6.3
34.7
826
826
Product Dependencies
Bus Topology
SAM3S8/SD8
SAM3S8/SD8
I/O Lines
Power Management
Interrupt
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 func-
tions to HSMCI pins.
Table 34-2.
The HSMCI is clocked through the Power Management Controller (PMC), so the programmer
must first configure the PMC to enable the HSMCI clock.
The HSMCI interface has an interrupt line connected to the Nested Vector Interrupt Controller
(NVIC).
Handling the HSMCI interrupt requires programming the NVIC before configuring the HSMCI.
Table 34-3.
Figure 34-3. High Speed MultiMedia Memory Card Bus Topology
Instance
Instance
HSMCI
HSMCI
HSMCI
HSMCI
HSMCI
HSMCI
HSMCI
I/O Lines
Peripheral IDs
18
ID
MCCDA
MCDA0
MCDA1
MCDA2
MCDA3
Signal
MCCK
1
9 1011
2 3 4 5 6
MMC
1213 8
7
I/O Line
PA28
PA29
PA30
PA31
PA26
PA27
Peripheral
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
C
C
C
C
C
C