Datasheet

747
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
39.6 Product Dependencies
39.6.1 I/O Lines
The pins used for interfacing the MultiMedia Cards or SD Cards may be multiplexed with PIO lines. The
programmer must first program the PIO controllers to assign the peripheral functions to MCI pins.
39.6.2 Power Management
The MCI may be clocked through the Power Management Controller (PMC), so the programmer must first
configure the PMC to enable the MCI clock.
39.6.3 Interrupt
The MCI interface has an interrupt line connected to the Advanced Interrupt Controller (AIC).
Handling the MCI interrupt requires programming the AIC before configuring the MCI.
39.7 Bus Topology
Figure 39-3. MultiMedia Memory Card Bus Topology
The MultiMedia Card communication is based on a 7-pin serial bus interface. It has three communication lines and
four supply lines.
Notes: 1. I: Input, O: Output, PP: Push/Pull, OD: Open Drain.
2. When several MCI (x MCI) are embedded in a product, MCCK refers to MCIx_CK, MCCDA to MCIx_CDA,
MCCDB to MCIx_CDB, MCDAy to MCIx_DAy, MCDBy to MCIx_DBy.
Table 39-2. Bus Topology
Pin Number Name Type
(1)
Description
MCI Pin Name
(2)
(Slot z)
1 RSV NC Not connected –
2 CMD I/O/PP/OD Command/response MCCDz
3 VSS1 S Supply voltage ground VSS
4 VDD S Supply voltage VDD
5 CLK I/O Clock MCCK
6 VSS2 S Supply voltage ground VSS
7 DAT[0] I/O/PP Data 0 MCDz0
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MMC