Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 567
SAM9G20
34.3 Application Block Diagram
Figure 34-2: Application Block Diagram
34.4 Pin Name List
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.
34.5 Product Dependencies
34.5.1 I/O Lines
The pins used for interfacing the MultiMedia Cards or SD Cards may be multiplexed with PIO lines. The programmer must first program
the PIO controllers to assign the peripheral functions to MCI pins.
34.5.2 Power Management
The MCI may be clocked through the Power Management Controller (PMC), so the programmer must first configure the PMC to enable
the MCI clock.
Table 34-1: I/O Lines Description
Pin Name
(2)
Pin Description Type
(1)
Comments
MCCDA/MCCDB Command/response I/O/PP/OD CMD of an MMC or SDCard/SDIO
MCCK Clock I/O CLK of an MMC or SD Card/SDIO
MCDA0–MCDA3 Data 0..3 of Slot A I/O/PP
DAT0 of an MMC
DAT[0..3] of an SD Card/SDIO
MCDB0–MCDB3 Data 0..3 of Slot B I/O/PP
DAT0 of an MMC
DAT[0..3] of an SD Card/SDIO
2 3 45617
MMC
2 3 456178
SDCard
9
Physical Layer
MCI Interface
Application Layer
ex: File System, Audio, Security, etc.