MultiMediaCard Product Manual
SanDisk MultiMediaCard Product Manual Rev. 2 © 2000 SANDISK CORPORATION
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Table 4-13 DSR Implementation Code Table
D S R _ I M P
DSR Type
0
no DSR implemented
1
DSR implemented
C_SIZE (Device Size)
—This parameter is used to compute the card capacity. The memory capacity of
the card is computed from the entries C_SIZE, C_SIZE_MULT and READ_BL_LEN as follows:
memory capacity = BLOCKNR * BLOCK_LEN
where
BLOCKNR = (1) * MULT
MULT = 2
C_SI2
(C_SIZE_MULT < 8)
BLOCK_LEN = 2
READ_BL_LEN
(READ_BL_LEN < 12)
Therefore, the maximum capacity which can be coded is 4096*512*2048 = 4 GBytes. Example: A four
MByte card with BLOCK_LEN = 512 can be coded with C_SIZE_MULT = 0 and C_SIZE = 2047.
VDD_R_CURR_MIN, VDD_W_CURR_MIN
—The minimum values for read and write currents on
VDD power supply are coded as follows:
Table 4-14 V
DD
Minimum Current Consumption
VDD_R_CURR_MIN
VDD_W_CURR_MIN
Code For Current Consumption @ V
D D
2:0
0=0.5mA; 1=1mA; 2=5mA; 3=10mA; 4=25mA;
5=35mA; 6=60mA; 7=100mA
VDD_R_CURR_MAX, VDD_W_CURR_MAX
—The maximum values for read and write currents on
VDD power supply are coded as follows:
Table 4-15 V
DD
Maximum Current Consumption
VDD_R_CURR_MAX
VDD_W_CURR_MAX
Code For Current Consumption @ V
D D
2:0
0=1mA; 1=5mA; 2=10mA; 3=25mA; 4=35mA;
5=45mA; 6=80mA; 7=200mA
C_SIZE_MULT (Device Size Multiplier)
—This parameter is used for coding a factor MULT for
computing the total device size (see ‘C_SIZE’). The factor MULT is defined as 2
C_SI2
.
Table 4-16 Multiply Factor For The Device Size
C_SIZE_MULT
MULT
Remark
0
2
2
= 4
1
2
3
= 8
2
2
4
= 16
3
2
5
= 32
4
2
6
= 64
5
2
7
= 128
6
2
8
= 256
7
2
9
= 512
