SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Manual download pdf (Page 36)

Industrial Grade SD Card Interface Description

3.4.5. Bus Timing

O DLY (max)

Shaded areas are not valid.

Output

Clock

Input

O DLY

(min)

TLH

ISU

THL

0.2

0.7

Figure 3-7. Timing Diagram Data Input/Output Referenced to Clock

Table 3-7. Bus Timing

Parameter Symbol Min. Max. Unit Remark

Clock CLK (All values are referred to min. (V

) and max. (V

)

Clock Frequency Data Transfer Mode f

0 25 MHz

≤ 100 pF

(7 cards)

Clock Frequency Identification Mode (The low

frequency is required for MultiMediaCard compatibility)

(1)

100KHz

400 kHz

≤ 250 pF

(21 cards)

Clock Low Time t

10 ns

≤ 100 pF

(7 cards)

Clock High Time t

10 ns

≤ 100 pF

(7 cards)

Clock Rise Time t

TLH

10 ns

≤ 100 pF

(10 cards)

Clock Fall Time t

THL

10 ns

≤ 100 pF

(7 cards)

Clock Low Time t

50 ns

≤ 250 pF

(21 cards)

Clock High Time t

50 ns

≤ 250 pF

(21 cards)

Clock Rise Time t

TLH

50 ns

≤ 250 pF

(21 cards)

Clock Fall Time t

THL

50 ns

≤ 250 pF

(21 cards)

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 118 119

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SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Manual Page 36

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