AT572D940HF_14 Datasheet, PDF (537/745 Pages) ATMEL Corporation – High Performance MagicV VLIW DSP

AT572D940HF Preliminary
The MultiMedia Card communication is based on a 7-pin serial bus interface. It has three com-
munication lines and four supply lines.
Table 29-2. Bus Topology
Pin
Number
1
2
3
4
5
6
7
Name
RSV
CMD
VSS1
VDD
CLK
VSS2
DAT[0]
Type⁽¹⁾
NC
I/O/PP/OD
S
S
I/O
S
I/O/PP
Description
Not connected
Command/response
Supply voltage ground
Supply voltage
Clock
Supply voltage ground
Data 0
MCI Pin Name⁽²⁾
(Slot z)
-
MCCDz
VSS
VDD
MCCK
VSS
MCDz0
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, MCDAy to MCIx_DAy.
Figure 29-4. MMC Bus Connections (One Slot)
MCI
MCDA0
MCCDA
MCCK
1234567
MMC1
1234567
MMC2
1234567
MMC3
Note: When several MCI (x MCI) are embedded in a product, MCCK refers to MCIx_CK, MCCDA to MCIx_CDA MCDAy to
MCIx_DAy.
Figure 29-5. SD Memory Card Bus Topology
1 2 3 4 5 6 78
9
SD CARD
7010A–DSP–07/08
537