- 您現在的位置：買賣IC網 > PDF目錄382301 > MC4GH02GNMCA-2SA00 (SAMSUNG SEMICONDUCTOR CO. LTD.) SAMSUNG MultiMediaCard PDF資料下載
參數資料
| 型號： | MC4GH02GNMCA-2SA00 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | SAMSUNG MultiMediaCard |
| 中文描述： | 三星多媒體 |
| 文件頁數： | 50/102頁 |
| 文件大小： | 1384K |
| 代理商： | MC4GH02GNMCA-2SA00 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁當前第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁
MultiMediaCard
TM
50
Sep.22.2005
Revision 0.3
6.2.9 Erase
MultiMediaCards, in addition to the implicit erase executed by the card as part of the write operation, provides a host
explicit erase function. The erasable unit of the MultiMediaCard is the “Erase Group”; Erase group is measured in write
blocks which are the basic writable units of the card. The size of the Erase Group is a card specific parameter and defined
in the CSD. The content of an explicitly erased memory range shall be 0.
The host can erase a contiguous range of Erase Groups. Starting the erase process is a three steps sequence. First the
host defines the start address of the range using the ERASE_GROUP_START (CMD35) command, next it defines the last
address of the range using the ERASE_GROUP_END (CMD36) command and finally it starts the erase process by issu-
ing the ERASE (CMD38) command. The address field in the erase commands is an Erase Group address in byte units.
The card will ignore all LSB’s below the Erase Group size, effectively rounding the address down to the Erase Group
boundary.
If an erase command (either CMD35, CMD36, CMD38) is received out of the defined erase sequence, the card shall set
the ERASE_SEQ_ERROR bit in the status register and reset the whole sequence.
If the host provides an out of range address as an argument to CMD35 or CMD36, the card will reject the command,
respond with the ADDRESS_OUT_OF_RANGE bit set and reset the whole erase sequence.
If an ‘non erase’ command (neither of CMD35, CMD36, CMD38 or CMD13) is received, the card shall respond with the
ERASE_RESET bit set, reset the erase sequence and execute the last command. Commands not addressed to the
selected card do not abort the erase sequence.
If the erase range includes write protected blocks, they shall be left intact and only the non protected blocks shall be
erased. The WP_ERASE_SKIP status bit in the status register shall be set.
As described above for block write, the card will indicate that an erase is in progress by holding DAT0 low. The actual
erase time may be quite long, and the host may issue CMD7 to deselect the card.
6.2.10 Write Protect Management
In order to allow the host to protect data against erase or write, the MultiMediaCard shall support two levels of write protect
commands:
The entire card may be write protected by setting the permanent or temporary write protect bits in the CSD.
Specific segments of the cards may be write protected. The segment size is defined in units of WP_GRP_SIZE erase
groups as specified in the CSD. The SET_WRITE_PROT command sets the write protection of the addressed write-pro
tect group, and the CLR_WRITE_PROT command clears the write protection of the addressed write-protect group.
The SEND_WRITE_PROT command is similar to a single block read command. The card shall send a data block contain-
ing 32 write protection bits (representing 32 write protect groups starting at the specified address) followed by 16 CRC bits.
The address field in the write protect commands is a group address in byte units. The card will ignore all LSB’s below the
group size.
If the host provides an out of range address as an argument to CMD28, CMD29 or CMD30, the card will reject the com-
mand, respond with the ADDRESS_OUT_OF_RANGE bit set and remain in the
Tran
state.
相關PDF資料 |
PDF描述 |
|---|---|
| MC206 | THIN SMD LOW/MEDIUM-FREQUENCY CRYSTAL UNIT |
| MC2300 | Navigator Motion Processor |
| MC26LS30 | Dual Differential Quad Single-Ended (EIA-423-A) Line Drivers |
| MC26LS30D | CABLE GLAND, PG29 |
| MC26LS30DR2 | Dual Differential Quad Single-Ended (EIA-423-A) Line Drivers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC4M | 制造商:G & J HALL 功能描述:STEP DRILL MULTICUT 4-12MM X 2MM 制造商:G & J HALL 功能描述:STEP DRILL, MULTICUT, 4-12MM X 2MM |
| MC-4-MALE | 制造商:Multi-Contact USA 功能描述: |
| MC4MANUAL | 制造商:Omron Corporation 功能描述: |
| MC-4R128CEE6B | 制造商:NEC 制造商全稱:NEC 功能描述:Direct Rambus DRAM RIMM Module 128M-BYTE 64M-WORD x 16-BIT |
| MC-4R128CEE6B-653 | 制造商:NEC 制造商全稱:NEC 功能描述:Direct Rambus DRAM RIMM Module 128M-BYTE 64M-WORD x 16-BIT |
發布緊急采購，3分鐘左右您將得到回復。