Data Sheet

THUNDERCOMM TurboX™ C40x SoM Datasheet
38
digital I/O characteristics:
Parameter
Description
Min
Typical
Max
Units
VIH
High-level input voltage
1.27V/1.84V
-
2.0V/2.98V
V
VIL
Low-level input voltage
-0.3
-
0.58/0.74
V
VHYS
Schmitt hysteresis voltage
100
-
-
mV
RPULL-UP
Pull-up resistance
10 K
-
100K
Ω
RPULL-DOWN
Pull-down resistance
10 K
-
100K
Ω
RKEEPER-UP
Keeper-up resistance
10 K
-
100K
Ω
RKEEPER-DOWN
Keeper-down resistance
10 K
-
100K
Ω
VOH
High-level output voltage
1.4/2.21
-
-
V
VOL
Low-level output voltage
0/0
-
0.45/0.36
V
Table 4-5 SD digital IO voltage performance (1.8V/2.95V)
The SoM Supports SD standards and exceptions
Applicable standard
Feature exceptions
Device variations
Multi Media Card Host Specification,
version 5.1 (JESD84-B51 - JEDEC)
None
Timing specifications as below
pictures
Secure Digital: Physical Layer Specification version 3.0
None
SDIO Card Specification version 2.0
None
Table 4-6 SDIO
Single data rate – SDR mode
Double data rate – DDR mode