hb288032mm1 Renesas Electronics Corporation., hb288032mm1 Datasheet - Page 72

• Manufacturer Part Number: hb288032mm1
• Description: Multimediacard 32 Mbyte - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HB288032MM1
Bus Signal Line Load
The total capacitance C
C
where N is the number of connected cards. Requiring the sum of the host and bus capacitance’s not to
exceed 30 pF for up to 10 cards, and 40 pF for up to 30 cards, the following values must not be exceeded:
Parameter
Pull-up resistance for CMD
Pull-up resistance for DAT
Bus signal line capacitance
Bus signal line capacitance
Single card capacitance
Maximum signal line inductance
72
HOST
, the bus capacitance C
C
L
=
C
HOST
+
C
L
BUS
of each line of the MultiMediaCard bus is the sum of the bus master capacitance
+
BUS
N*C
itself and the capacitance C
CARD
Symbol
R
R
C
C
C
CMD
DAT
L
L
CARD
Min
4.7
50
—
—
—
—
CARD
Max
100
100
250
100
7
16
of each card connected to this line:
Unit
k
k
pF
pF
pF
nH
Remark
to prevent bus floating
to prevent bus floating
f
30 cards
f
10 cards
f
PP
PP
PP
5 MHz,
20 MHz,
20 MHz