Data Sheet

22
FORM NO.: FR2-015_ A Responsible Department：WBU Expiry Date: Forever
The information contained herein is the exclusive property of AzureWave and shall not be distributed, reproduced, or
disclosed in whole or in part without prior written permission of AzureWave.
Default Speed, High-Speed Modes
SDIO Protocol Timing Diagram – Default Speed Mode
SDIO Protocol Timing Diagram – High Speed Mode
SDIO Timing Data- Default Speed, High-Speed Modes
Symbol
Parameter
Condition
Min
Max
Units
f
pp
CLK Frequency
Normal
0
25
MHz
High Speed
0
50
t
WL
CLK low Time
Normal
10
-
High Speed
7
-
t
WH
CLK High Time
Normal
10
-
High Speed
7
-
t
ISU
Input Setup Time
Normal
5
-
High Speed
6
-
t
IH
Input Hold Time
Normal
5
-
High Speed
2
-
t
ODLY
Output Delay Time
Normal
-
14
High Speed
-
14
T
OH
Output hold time
High Speed
2.5
1. For SDIO 2.0 running at 50MHz clock frequency, only 1.8V is supported.
2. For SDIO 2.0 running at 25MHz clock frequency, 1.8V is supported.