Schematic

NC
1
CS#
2
DI
3
VCC
4
SCK
5
GND
6
DO
7
RSV
8
CD1
CD1
CD2
CD2
GND1
GND1
GND2
GND2
U701
MICROSD
C701
100nF
+3.3V
SS1/PWM4
SCK
MOSI
MISO
24AA02E48 EEPROM w/ MAC
i2c address 0x50,
Cut jumpers if unwanted
MicroSD Card Slot
1
1
2
2
SJ701
SJ
1
1
2
2
SJ702
SJ
SCL
1
Vss
2
SDA
3
A1
4
A0
5
Vcc
6
U702
24AA025E48
SCL0−3
SDA0−3
+5V
NB: This device could be run on 3.3V but it happens
to be located in a section of the board above a 5V power
plane, and it will happily run on 5V.