Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

 671

SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

High Speed MultiMedia Memory Card Bus Topology

The High Speed MultiMedia Card communication is based on a 13-pin serial bus interface. It has three communi-
cation lines and four supply lines.

Notes:

1. I: Input, O: Output, PP: Push/Pull, OD: Open Drain.

2. When several HSMCI (x HSMCI) are embedded in a product, MCCK refers to HSMCIx_CK, MCCDA to 

HSMCIx_CDA, MCDAy to HSMCIx_DAy.

2 3 4 5 6

1

7

MMC

9 1011

1213 8

Bus Topology

1

DAT[3]

I/O/PP

Data MCDz3

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

8

DAT[1]

I/O/PP

Data 1

MCDz1

9

DAT[2]

I/O/PP

Data 2

MCDz2

10

DAT[4]

I/O/PP

Data 4

MCDz4

11

DAT[5]

I/O/PP

Data 5

MCDz5

12

DAT[6]

I/O/PP

Data 6

MCDz6

13

DAT[7]

I/O/PP

Data 7

MCDz7