Microchip Technology SAM Series User Manual

Figure 11-6. Standard SD, Mini and Micro SD Card - SPI and SDHC Pinout Diagram
Figure 11-7. SD Card SDHC Design Example Diagram
SD/MMC (SDHC) SD CARD PROTECTION EXAMPLE
1
2
3
4
5
6
7
8
9
STD SD CARD (Option B)
MCU
SDCMD
SDCK
NOTE:
Ground connection on all Transient Suppressors MUST be directly
connected to ground plane and not through a trace to ground to
minimize inductance. In addition, they should be located as close to the
external SD card connector as possible.
Transient Suppressors →
3.3v
10K (x6)
1nf
Opt(B)
Chassis
(AC) Gnd
if available
(Preferred)
If chassis (AC) Gnd
not available
Opt(A)
100K
1k Ω@100Mhz, DC=0.15Ω, 1A
MI0805J102R-10
NOTE:
See appropriate MCU power
bypassing circuit configuration
illustrations in section 2.2
SDDAT0
SDDAT3
1
2
3
4
5
6
7
8
MICRO SD CARD
(Option A)
Opt(B)
Chassis
(AC) Gnd
if available
(Preferred)
If chassis (AC) Gnd
not available
Opt(A)
100K
SDDAT1
SDDAT2
C1
C2
C3
C4
C5
C6
A1
A2
A3
A4
A5
A6
C1
C2
C3
C4
C5
C6
A1
A2
A3
A4
A5
A6
GND
GND
GND
Transient Suppressors →
#SDCD
3.3v
MI0805J102R-10
#WP
#CD
#Card Det
#Wr Protect
CM1422‐03CP
A7
A8
C7
C8
B1−B4
C7
C8
CM1422‐03CP
A7
A8
GND
B1−B4
MI0805J102R-10
#SDWP
#CD
#WP
10K (x2)
Serial Data Corruption Errors
© 2022 Microchip T
echnology Inc.
and its subsidiaries
Manual
DS70005439B-page 40

Microchip Technology SAM Series Specifications

General

Brand	Microchip Technology
Model	SAM Series
Category	Microcontrollers
Language	English