Datasheet

40.5 Pin Name List
Table 40-1. I/O Lines Description for 4-bit Configuration
Pin Name
(1)
Pin Description Type
(2)
Comments
MCCDA Command/response I/O/PP/OD CMD of an MMC or SDCard/SDIO
MCCK Clock O CLK of an MMC or SD Card/SDIO
MCDA0–MCDA3 Data 0..3 of Slot A I/O/PP DAT[0..3] of an MMC
DA
T[0..3] of an SD Card/SDIO
Note: 1. When several HSMCI (x HSMCI) are embedded in a product, MCCK refers to HSMCIx_CK, MCCDA to
HSMCIx_CDA, MCDA
y to HSMCIx_DAy.
Note: 2. I: Input, O: Output, PP: Push/Pull, OD: Open Drain.
40.6 Product Dependencies
40.6.1 I/O Lines
The pins used for interfacing the High Speed MultiMedia Cards or SD Cards are multiplexed with PIO lines. The
programmer must first program the PIO controllers to assign the peripheral functions to HSMCI pins.
40.6.2 Power Management
The HSMCI is clocked through the Power Management Controller (PMC), so the programmer must first configure the
PMC to enable the HSMCI clock.
40.6.3 Interrupt Sources
The HSMCI has an interrupt line connected to the interrupt controller.
Handling the HSMCI interrupt requires programming the interrupt controller before configuring the HSMCI.
40.7 Bus Topology
Figure 40-3. High Speed MultiMedia Memory Card Bus Topology
2 3 4 5 61 7
MMC
9 1011 1213 8
The High Speed MultiMedia Card communication is based on a 13-pin serial bus interface. It has three
communication lines and four supply lines.
T
able 40-2. Bus Topology
Pin Number Name Type
(1)
Description HSMCI Pin Name
(2)
(Slot z)
1 DAT[3] I/O/PP Data MCDz3
2 CMD I/O/PP/OD Command/response MCCDz
3 VSS1 S Supply voltage ground VSS
SAM E70/S70/V70/V71 Family
High-Speed Multimedia Card Interface (HSMCI)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 928