Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 569
SAM9G20
Figure 34-5: SD Memory Card Bus Topology
The SD Memory Card bus includes the signals listed in Table 34-3.
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 34-6: SD Card Bus Connections with 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 34-3: SD Memory Card Bus Signals
Pin Number Name Type
(1)
Description
MCI Pin Name
(2)
(Slot z)
1 CD/DAT[3] I/O/PP Card detect/ Data line Bit 3 MCDz3
2 CMD PP 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 line Bit 0 MCDz0
8 DAT[1] I/O/PP Data line Bit 1 or Interrupt MCDz1
9 DAT[2] I/O/PP Data line Bit 2 MCDz2
2 3 456178
SD CARD
9
2 3 45617
MCDA0 - MCDA3
MCCDA
MCCK
8
SD CARD
9