Revision 1.0 MultiMediaCard and RS-MultiMediaCard Product Manual
© 2004 SanDisk Corporation 3-7
051304
Figure 3-4 Bus Signal Levels
3.4.5 Open-drain Mode Bus Signal Level
The input levels shown in Table 3-5 are identical to the push-pull mode bus signal levels.
Table 3-5 Open Drain Mode Bus Signal Levels
Parameter Symbol Min. Max.
Unit Conditions
Output high voltage VOH
V
DD-0.2
--- V
IOH = -100 uA Output low voltage
VOL ---
0.3 V
IOL = 2 mA
3.4.6 Push-pull Mode Bus Signal Level
To meet the requirements of the JEDEC specification JESD8-1A, the card input and output voltages will be within the specified ranges in Table 3-6 for any VDD of the allowed
voltage range.
Table 3-6 Push-pull Mode Bus Signal Level
Parameter Symbol Min. Max. Unit
Conditions
Output high voltage VOH
0.75 V
DD
--- V
IOH = -100 uA V
DD
min. Output low voltage
VOL ---
0.125 V
DD
V IOL = 100 uA V
DD
min. Input high voltage
VIH 0.625 V
DD
V
DD
+ 0.3 V
Input low voltage VIL
V
SS
-0.3 0.25 V
DD
V ---
Input Low
Level Input
High Level
Output High
Level
Output Low
Level Undefined
V
DD
V
OH
V
IH
V
L
V
OL
V
SS
t V
Revision 1.0 MultiMediaCard and RS-MultiMediaCard Product Manual
© 2004 SanDisk Corporation 3-8
051304
3.4.7 Bus Timing
SanDisk’s MultiMediaCards and RS- MultiMediaCards clock data in on the rising edge and out on the falling edge. The data contained in the shaded areas is not valid in Figure 3-5.
Figure 3-5 Data InOut Referenced to Clock Timing
Table 3-7 Bus Timing
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 20 MHz
C
L
100 pF 10 cards Clock Freq. Identification Mode
f
OD
400 kHz
C
L
250 pF 30 cards Clock Low Time
t
WL
10 --- ns C
L
100 pF 10 cards Clock High Time
t
WH
10 --- ns C
L
100 pF 10 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 10 cards Clock Low Time
t
WL
50 --- ns C
L
250 pF 30 cards Clock High Time
t
WH
50 --- ns C
L
250 pF 30 cards Clock Rise Time
t
TLH
--- 50 ns C
L
250 pF 30 cards Clock Fall Time
t
THL
--- 50 ns C
L
250 pF 30 cards
Inputs CMD, DAT – referenced to CLK
Input setup time t
ISU
3 --- ns Input hold time
t
IH
3 ---
ns
Outputs CMD, DAT – referenced to CLK
Output setup time t
OSU
5 --- ns
Output hold time t
ODLY
5 --- ns
Revision 1.0 MultiMediaCard and RS-MultiMediaCard Product Manual
© 2004 SanDisk Corporation 3-9
051304
3.5 MultiMediaCardRS-MultiMediaCard Registers
