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參數(shù)資料
| 型號： | MC4GH01GNMCA-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(shù)： | 34/102頁 |
| 文件大?。?/td> | 1384K |
| 代理商： | MC4GH01GNMCA-2SA00 |
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MultiMediaCard
TM
34
Sep.22.2005
Revision 0.3
S_CMD_SET
This field defines which command sets are supported by the card.
MIN_PERF_a_b_ff
These fields defines the overall minimum performance value for the read and write access with different bus width and
max clock frequency modes. The value in the register is coded as follows. Other than defined values are illegal.
Bit
Command Set
7-3
Reserved
2
Content Protection SecureMMC
1
SecureMMC
0
Standard MMC
Value
Performance
0x00
For Cards not reaching the 2.4MB/s minimum value
0x08
Class A: 2.4MB/s and is the lowest allowed value for MMCplus and MMCmobile(16x150kB/s)
0x0A
Class B: 3.0MB/s and is the next allowed value (20x150kB/s)
0x0F
Class C: 4.5MB/s and is the next allowed value (30x150kB/s)
0x14
Class D: 6.0MB/s and is the next allowed value (40x150kB/s)
0x1E
Class E: 9.0MB/s and is the next allowed value (60x150kB/s)
This is also the highest class which any MMCplus or MMCmobile card is needed to support in low bus
category operation mode (26MHz with 4bit data bus).
A MMCplus or MMCmobile card supporting any higher class than this have to support this class also
(in low category bus operation mode).
0x28
Class F: Equals 12.0MB/s and is the next allowed value (80x150kB/s)
0x32
Class G: Equals 15.0MB/s and is the next allowed value (100x150kB/s)
0x3C
Class H: Equals 18.0MB/s and is the next allowed value (120x150kB/s)
0x46
Class J: Equals 21.0MB/s and is the next allowed value (140x150kB/s)
This is also the highest class which any MMCplus or MMCmobile card is needed to support in mid bus
category operation mode (26MHz with 8bit data bus or 52MHz with 4bit data bus).
A MMCplus or MMCmobile card supporting any higher class than this have to support this Class (in
mid category bus operation mode) and Class E also (in low category bus operation mode)
0x50
Class K: Equals 24.0MB/s and is the next allowed value (160x150kB/s)
0x64
Class M: Equals 30.0MB/s and is the next allowed value (200x150kB/s)
0x78
Class O: Equals 36.0MB/s and is the next allowed value (240x150kB/s)
0x8C
Class R: Equals 42.0MB/s and is the next allowed value (280x150kB/s)
0xA0
Class T: Equals 48.0MB/s and is the last defined value (320x150kB/s)
Table 5-28 : R/W Access Performance Value
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