Datasheet

825
32072H–AVR32–10/2012
AT32UC3A3
The SD Memory Card bus includes the signals listed in Table 31-3 on page 825.
Notes: 1. I: input, O: output, PP: Push Pull, OD: Open Drain.
Figure 31-6. SD Card Bus Connections with One Slot
Figure 31-7. SD Card Bus Connections with Two Slots
Table 31-3. 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 DATAz[3]
2 CMD PP Command/response CMDz
3 VSS1 S Supply voltage ground VSS
4 VDD S Supply voltage VDD
5 CLK I/O Clock CLK
6 VSS2 S Supply voltage ground VSS
7 DAT[0] I/O/PP Data line Bit 0 DATAz[0]
8 DAT[1] I/O/PP Data line Bit 1 or Interrupt DATAz[1]
9 DAT[2] I/O/PP Data line Bit 2 DATAz[2]
2
9
345678
SDCARD
1
CMD
CLK
DATA[3:0]
523 61478
9
SDCARD1
523 61478
9
SDCARD2
DATA[7:4]
CMD[0]
CLK
DATA[3:0]
CMD[1]
CLK