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Chapter 1
Fixed Behavior Signals
SD Implementation on the Reference Carrier Board
Figure 1-5 shows a schematic design for the SD implementation on the reference carrier board.
Figure 1-5.
SD Reference Schematic
S
D_CLK
S
D_PW R_EN
S
D_OC#
S
D_CD#
S
D_W P
VOUT_
S
D
S
D_D2
S
D_D1
S
D_D0
S
D_D
3
S
D_CMD
3
4
12
6
1
3
9
8
7
11
2
5
1
10
J2
S
hi
el
d1
WP
S
D
S
OCKET
Common
C
a
rdDetect
D1
D0
V
ss
2
CLK
Vdd
V
ss
1
CMD
CD/D
3
D2
CONN9-7644
3
2-01-RA
2
1
C1
3
0.1 UF
10%
16 V
1
2
C144
10%
0.1 UF
16 V
+
3
.
3
V
2
1
C12
10 UF
10%
10 V
4
3
2
5
6
7
8
1
U9
EN
IN
S
1
IN
S
2
GND
OC#
OUTD1
OUTD2
OUTD
3
TP
S
20
3
0D
2
1
R14
4.7 K
0.5%
1/16 W
+
3
.
3
V
2
2
2
2
2
2
2
2
2
1
2
R
3
8
0 5%
1/16 W
1
2
R21
1 K
0.5%
1
2
R198
1 K
0.5%
1
2
2
1
R199
1 K
0.5%
2
1
68.1 .5%
1/16 W
68.1 0.5%
1/16 W
24.9 0.5%
1/16 W
24.9 0.5%
1/16 W
24.9 0.5%
1/16 W
24.9 0.5%
1/16 W
24.9 0.5%
1/16 W
R217
+
3
.
3
V
+
3
.
3
V
2
1
2
1
2
1
2
1
2
1
R216
R211
R212
R21
3
R214
R215
C205
0.1UF 10%
50 V
1
2