Datasheet

SAM9G20
DS60001516A-page 568  2017 Microchip Technology Inc.
34.5.3 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.
34.6 Bus Topology
Figure 34-3: 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.
Note 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.
Figure 34-4: MMC Bus Connections (One Slot)
Note: When several MCI (x MCI) are embedded in a product, MCCK refers to MCIx_CK, MCCDA to MCIx_CDA MCDAy to
MCIx_DAy.
Table 34-2: 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
2 3 45617
MMC
2 3 4561723 4561723 45617
MCCDA
MCDA0
MCCK
MMC1 MMC2 MMC3
MCI