SanDisk SDSDH-1024 Product Manual - Page 29

Data In/Out Referenced to Clock Timing default, Table 3-7, Bus Timing Parameter Values

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Revision 2.2 Chapter 3 - SD Card Interface Description SD Card Product Manual 3.4.6 Bus Timing (default) Default dataIn/dataOut timing is illustrated in Figure 3-7; bus timing parameter values are shown in Table 3-7. Figure 3-7 Data In/Out Referenced to Clock Timing (default) Table 3-7 Bus Timing Parameter Values (default) Parameter Symbol Min Max Unit Clock (CLK) - all values referred to min. VIH and max. VIL Clock Freq. Data Transfer Mode fPP 0 25 Clock Freq. Identification Mode9 fOD 010/10 400 0 Clock Low Time tWL 10 --- Clock High Time tWH 10 --- Clock Rise Time tTLH --- 10 Clock Fall Time tTHL --- 10 Clock Low Time Clock High Time Clock Rise Time Clock Fall Time tWL 50 --- tWH 50 --- tTLH --- 50 tTHL --- 50 Inputs CMD, DAT - referenced to CLK Input setup time Input hold time tISU 5 --- tIH 5 --- Outputs CMD, DAT - referenced to CLK MHz kHz ns ns ns ns ns ns ns ns ns ns Remark CL < 100 pF (7 cards) CL < 250 pF (21 cards) CL < 100 pF (7 cards) CL < 100 pF (7 cards) CL < 100 pF (10 cards) CL < 100 pF (7 cards) CL < 250 pF (21 cards) CL < 250 pF (21 cards) CL < 250 pF (21 cards) CL < 250 pF (21 cards) CL < 25 pF (1 card) CL < 25 pF (1 card) 9 Low frequency required for MMC compatibility. 10 0 Hz stops clock-given min. freq. range is for cases in which a continuous clock is required. © 2004 SanDisk Corporation 3-9 12/08/04

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Chapter 3 – SD Card Interface Description
Revision 2.2
SD Card Product Manual
© 2004 SanDisk Corporation
3-9
12/08/04
3.4.6
Bus Timing (default)
Default dataIn/dataOut timing is illustrated in Figure 3-7; bus timing parameter values are
shown in Table 3-7.
Figure 3-7
Data In/Out Referenced to Clock Timing (default)
Table 3-7
Bus Timing Parameter Values (default)
Parameter
Symbol
Min
Max
Unit
Remark
Clock (CLK) – all values referred to min. V
IH
and max. V
IL
Clock Freq. Data Transfer Mode
f
PP
0
25
MHz
C
L
<
100 pF (7 cards)
Clock Freq. Identification Mode
9
f
OD
0
10
/10
0
400
kHz
C
L
<
250 pF (21 cards)
Clock Low Time
t
WL
10
---
ns
C
L
<
100 pF (7 cards)
Clock High Time
t
WH
10
---
ns
C
L
<
100 pF (7 cards)
Clock Rise Time
t
TLH
---
10
ns
C
L
<
100 pF (10 cards)
Clock Fall Time
t
THL
---
10
ns
C
L
<
100 pF (7 cards)
Clock Low Time
t
WL
50
---
ns
C
L
<
250 pF (21 cards)
Clock High Time
t
WH
50
---
ns
C
L
<
250 pF (21 cards)
Clock Rise Time
t
TLH
---
50
ns
C
L
<
250 pF (21 cards)
Clock Fall Time
t
THL
---
50
ns
C
L
<
250 pF (21 cards)
Inputs CMD, DAT – referenced to CLK
Input setup time
t
ISU
5
---
ns
C
L
<
25 pF (1 card)
Input hold time
t
IH
5
---
ns
C
L
<
25 pF (1 card)
Outputs CMD, DAT – referenced to CLK
9
Low frequency required for MMC compatibility.
10
0 Hz stops clock—given min. freq. range is for cases in which a continuous clock is required.