Data Sheet

K255B-SR
FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information
15
6.2 SDIO Pin Description
The module supports SDIO version 3.0 for all 1.8V to 3.3V.
SDIO Pin Description
SD 4-Bit Mode
DATA0
Data Line 0
DATA1
Data Line 1 or Interrupt
DATA2
Data Line 2 or Read Wait
DATA3
Data Line 3
CLK
Clock
CMD
Command Line
6.3 SDIO Default Mode Timing Diagram
Parameter
Symbol
Minimum
Typical
Maximum
Unit
SDIO CLK(All values are referred to minimum VIH and maximum VIL
b
)
Frequency - Data Transfer mode
fPP
0
-
25
MHz
Frequency - Identification mode
fOD
0
-
400
kHz
Clock low time
tWL
10
-
-
ns
Clock high time
tWH
10
-
-
ns
Clock rise time
tTLH
-
-
10
ns
Clock low time
tTHL
-
-
10
ns
Inputs:CMD, DAT(referenced to CLK)
Input setup time
tISU
5
-
-
ns
Input hold time
tIH
5
-
-
ns