SDIO and SD Card
Jetson AGX Xavier Series Product DG-09840-001_v2.5 | 96
Parameter Requirement Units Notes
Max
SDR104 / DDR50
Min
Max
16 (100)
128 (805)
16 (100)
48 (305)
Max Trace Delay Skew in/between
and
/
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
CCARD (CDIE+CPKG)
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
UHS50 Card = optional, UHS104 Card = mandatory
D 100 Ω UHS50 Card = optional, UHS104 Card = mandatory
FMAX (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
CLOAD (CCARD+CEQ)
(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
CLOAD (CCARD+CEQ)
(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
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