SDMJ-32 SanDisk, SDMJ-32 Datasheet - Page 37

• 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
E
v
Every DOS partition is based on a 12-bit, 16-bit FAT or VFAT, respectively. All sector
numbers are stored in Little-Endian format (least significant byte first). The start and end
addresses of the partition are given in terms of heads, tracks and sectors, and can therefore
be ignored for the MultiMediaCard, since the position of the partition can be determined by
the last two entries.
The boot sector is described in Table 3-31.
Table 3-31
*Not used in DOS-based systems.
Byte Position
Byte Position
0x5
0x8
0xc
0x10
0x13
0x15
0x16
0x18
0x11
0x0
0x3
0xb
0xd
0xe
Length (bytes)
Boot Sector Configuration
4
3
4
Length (bytes)
3
8
2
1
2
1
2
2
1
2
2
Last partition sector
First sector position relative to
beginning of device
Number of sectors in partition
3-22
MultiMediaCard and RS-MultiMediaCard Product Manual
Entry Description
Jump command
OEM name
Bytes/sector
Sectors/cluster
Reserved Sectors
(Number of reserved
sectors at the beginning
of the media including
the boot sector.)
Number of FATs
Number of root
directory entries
Number of sectors on
media
Media descriptor
Sectors/FAT
Sectors/track
Entry Description
Chapter 3 –Interface Description
Address of Last Sector
Number of First Sector
(Linear Address)
Between one and max.
amount of sectors on
device
0xeb 0xXX 0x90
XXX
512
XXX (range: 1-64)
1
2
512
XXX (Depends on card
capacity, if the media
has more than 65535
sectors, this field is zero
and the ‘number of total
sectors’ is set.)
0xf8 (hard disk)
XXX
32 (no meaning)
Value/Range
Value/Range
07/15/05