at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 591

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

6384B–ATARM–15-Dec-08
Figure 35-5. SD Memory Card Bus Topology
The SD Memory Card bus includes the signals listed in
Table 35-3.
Notes:
Figure 35-6. SD Card Bus Connections with One Slot
Note:
Pin Number
1
2
3
4
5
6
7
8
9
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
When several MCI (x MCI) are embedded in a product, MCCK refers to MCIx_CK, MCCDA to
MCIx_CDA MCDAy to MCIx_DAy.
MCIx_CDA, MCCDB to MCIx_CDB, MCDAy to MCIx_DAy, MCDBy to MCIx_DBy.
SD Memory Card Bus Signals
Name
CD/DAT[3]
CMD
VSS1
VDD
CLK
VSS2
DAT[0]
DAT[1]
DAT[2]
MCDA0 - MCDA3
MCCDA
MCCK
Type
I/O/PP
PP
S
S
I/O
S
I/O/PP
I/O/PP
I/O/PP
(1)
9
1
AT91SAM9G20 Preliminary
2 3 4 5 6
SD CARD
Supply voltage ground
Supply voltage ground
Data line Bit 0
Data line Bit 2
Description
Card detect/ Data line Bit 3
Command/response
Supply voltage
Clock
Data line Bit 1 or Interrupt
7 8
Table
35-3.
SD CARD
MCI Pin Name
(Slot z)
MCDz3
MCCDz
VSS
VDD
MCCK
VSS
MCDz0
MCDz1
MCDz2
(2)
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