SDIO and SD Card
Jetson AGX Xavier Series Product
DG-09840-001_v2.5 | 96
Parameter
Requirement
Units
Notes
Min
Max
SDR104 / DDR50
Min
Max
16 (100)
128 (805)
16 (100)
48 (305)
mm (ps)
Max Trace Delay Skew in/between CLK and
CMD/DAT
SDR50 / SDR25 / SDR12 / HS / DS
SDR104 / DDR50
15.5 (100)
5 (30)
mm (ps)
See Note 3
Noise Coupling Avoidance
Keep critical traces away from other signal traces or unrelated power
traces/areas or power supply components
Notes:
1.
Actual frequencies may be lower due to clock source/divider limitations.
2.
If PWR, 0.01uF decoupling cap required for return current.
3.
If routing to SD Card socket includes a flex or 2nd PCB, max trace and skew calculations must include PCB and flex routing.
Table 11-4.
SD Card Loading vs. Drive Type
General SD Card
Compliance
Parameter
Value
Units Notes
C
CARD
(C
DIE
+C
PKG
)
Min
5
pF
Spec best case value
Max
10
pF
Spec worst case value
Drive Type
A
33
Ω
UHS50 Card = optional, UHS104 Card = mandatory
B
50
Ω
UHS50 Card = mandatory, UHS104 Card = mandatory
C
66
Ω
UHS50 Card = optional, UHS104 Card = mandatory
D
100
Ω
UHS50 Card = optional, UHS104 Card = mandatory
F
MAX
(CLK base frequency)
SDR104
208
MHz
Single data rate up to 104MB/sec
DDR50
50
MHz
Double data rate up to 50MB/sec
SDR50
100
MHz
Single data rate up to 50MB/sec
SDR25
50
MHz
Single data rate up to 25MB/sec
SDR12
25
MHz
Single data rate up to 12.5MB/sec
HS
50
MHz
Single data rate up to 25MB/sec
DS
25
MHz
Single data rate up to 12.5MB/sec
C
LOAD
(C
CARD
+C
EQ
)
(CLK freq = 208MHz)
Drive Type = A
21
pF
Total load capacitance supported
Drive Type = B
15
pF
Total load capacitance supported
Drive Type = C
11
pF
Total load capacitance supported
Drive Type = D
22
pF
Possibly 22pF+ depending on host system
C
LOAD
(C
CARD
+C
EQ
)
(CLK freq = 100/50/25MHz)
Drive Type = A
43
pF
Total load capacitance supported
Drive Type = B
30
pF
Total load capacitance supported
Drive Type = C
23
pF
Total load capacitance supported
Drive Type = D
22
pF
Possibly 22pF+ depending on host system