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Pin No
Mnemonic
Signal Description
14
MCI0_WP
SDMMC0_WP_PA12
15
GND
GND
16
GND
GND
3.2.9.3
SDMMC0 VDDHC Voltage Switching
The board uses an ADG849 to switch the power line VDDSDHC_3V3 or VDDSDHC_1V8 through the
command line SDMMC0_VDDSEL_PA11.
Figure 3-23. SDMMC0 VDDSDHC Voltage Switching
GND_POWER
GND_POWER
VDD_3V3
VDD_3V3
VDDSDHC1V8
VDDSDHC
SDMMC0_VDDSEL_PA11
U9
ADG849YKSZ-REEL
SC70
S2
6
S1
4
IN
1
G
N
D
3
D
5
V
D
D
2
R151
DNP
R0402
R150
10k
R0402
R152
DNP
R0402
C107
100nF
C0402
Table 3-8. SDMMC1 Power Command
PIO
Mnemonic
Signal Description
PA11
SDMMC0_VDDSEL
Selects 3.3V or 1.8V
3.2.9.4
SDMMC1 Card Connector
A microSD card connector, connected to SDMMC1, is mounted on the top side of the board. The
SDMMC1 communication is based on a 9-pin interface (clock, command, card detect, four data and
power lines). A card detection switch is included. The microSD connector can be used to connect any
microSD card for mass storage.
Figure 3-24. SDMMC1 microSD Socket
(MCI1_DA1)
(MCI1_DA0)
(MCI1_CK)
(MCI1_CDA)
(MCI1_DA3)
(MCI1_DA2)
(MCI1_CD)
GND_POWER
GND_POWER
VDD_3V3
SDMMC1_CK_PA22
SDMMC1_CD_PA30
SDMMC1_CMD_PA28
SDMMC1_DAT1_PA19
SDMMC1_DAT0_PA18
SDMMC1_DAT2_PA20
SDMMC1_DAT3_PA21
R160
10k
R0402
R162
68k
R0603
R170
10k
R0402
R164
68k
R0603
R166
68k
R0603
R168
68k
R0603
C109
100nF
C0402
C108
10uF
C0603
SW1
SW2
J7
PJS008-2120-0
Micro_SD_PJS008
8
5
7
6
4
3
2
1
9
13
12
11
10
14
SAMA5D2-PTC-EK
Board Components
©
2017 Microchip Technology Inc.
DS50002709A-page 23