Bus Timing - SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual

SD Card Interface Description

3.4.5. Bus Timing

Output
Figure 3-7. Timing Diagram Data Input/Output Referenced to Clock
Parameter
Clock Frequency Data Transfer Mode
Clock Frequency Identification Mode (The low
frequency is required for MultiMediaCard compatibility)
Clock Low Time
Clock High Time
Clock Rise Time
Clock Fall Time
Clock Low Time
Clock High Time
Clock Rise Time
Clock Fall Time
3-10
0.7
0.2
Clock
t THL
Input
t O DLY (max)
Table 3-7. Bus Timing
Clock CLK (All values are referred to min. (V
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
f PP
t WL t WH
t TLH
t ISU t IH
t O DLY
(min)
Shaded areas are not valid.
Symbol Min. Max.
) and max. (V
IH
f 0 25
PP
f 0 / 400
OD (1)
100KHz
t 10
WL
t 10
WH
t 10
TLH
t 10
THL
t 50
WL
t 50
WH
t 50
TLH
t 50
THL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
Unit Remark
)
IL
MHz
C ≤ 100 pF
L
(7 cards)
kHz C ≤ 250 pF
L
(21 cards)
ns C ≤ 100 pF
L
(7 cards)
ns C ≤ 100 pF
L
(7 cards)
ns
C ≤ 100 pF
L
(10 cards)
ns
C ≤ 100 pF
L
(7 cards)
ns C ≤ 250 pF
L
(21 cards)
ns C ≤ 250 pF
L
(21 cards)
ns C ≤ 250 pF
L
(21 cards)
ns
C ≤ 250 pF
L
(21 cards)