SDMJ-32 SanDisk, SDMJ-32 Datasheet - Page 32

• Manufacturer Part Number: SDMJ-32
• Manufacturer: SanDisk
• Type: MultiMedia Cardr

Specifications of SDMJ-32

• Density: 32MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Package Type: MMC
• Mounting: Socket
• Pin Count: 7
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Programmable: Yes
• Lead Free Status / RoHS Status: Compliant

Revision 1.3
© 2005 SanDisk Corporation
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Table 3-24
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Table 3-25
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WRITE_BL_PARTIAL
R2W_FACTOR
This size is given as the minimum number of write blocks that can be erased in a
single erase command.
ERASE_GRP_MULT—5-bit binary coded value used for calculating the size of the
erasable unit of the card. See ERASE_GRP_SIZE section for detailed description.
WP_GRP_SIZE—write protected group size. The content of this register is a 5-bit
binary coded value, defining the number of Erase Groups (see ERASE_GRP_SIZE).
The actual size is computed by increasing this number by one. A value of 0 means 1
erase group, 127 means 128 erase groups.
WP_GRP_ENABLE—A value of “0” means group write protection is not possible.
R2W_FACTOR—defines the typical block program time as a multiple of the read
access time. Table 3-24 defines the field format.
WRITE_BL_LEN—block length for write operations. See READ_BL_LEN for field
coding.
WRITE_BL_PARTIAL—defines whether partial block sizes can be used in block
write commands.
FILE_FORMAT_GROUP—indicates the selected group of file formats. This field is
read-only for ROM.
COPY—marks the card as an original (0) or non-original (1). Once set to non-original,
this bit cannot be reset to original. The definition of “original” and “non-original” is
application dependent and does not change card characteristics.
PERM_WRITE_PROTECT—permanently protects the whole card content against
overwriting or erasing (all write and erase commands for this card are permanently
disabled). The default value is 0 (i.e., not permanently write protected).
TMP_WRITE_PROTECT—temporarily protects the whole card content from being
overwritten or erased (all write and erase commands for this card are temporarily
disabled). This bit can be set and reset. The default value is 0 (i.e., not write protected).
0
1
2
3
4
5
6
7
0
1
R2W_FACTOR
1
2 (write half as fast as read)
4
8
16
32
64
128
Only the WRITE_BL_LEN block size, and its partial derivatives in
resolution of units of 512 blocks, can be used for block oriented data
write.
Smaller blocks can be used as well. The minimum block size is one
byte.
3-17
MultiMediaCard and RS-MultiMediaCard Product Manual
Multiples of Read Access Time
Definition
Chapter 3 –Interface Description
07/15/05