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參數(shù)資料
| 型號(hào)： | HB28D032MM2 |
| 廠(chǎng)商： | Hitachi,Ltd. |
| 英文描述： | MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte |
| 中文描述： | 多媒體16 Mbyte/32 Mbyte/64 Mbyte/128字節(jié) |
| 文件頁(yè)數(shù)： | 84/88頁(yè) |
| 文件大?。?/td> | 329K |
| 代理商： | HB28D032MM2 |
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HB28E016/D032/D064/B128MM2
84
Access Time
Parameter
Symbol
Typ
Max
Unit
Remark
Synchronous access delay cycles
N
SAD
T
SAD
T
AAD
t
AT
—
16
cycles
Synchronous access delay
—
0.8
μs
at 20 MHz clock frequency
Asynchronous access delay
300
—
μs
Memory access time
Note:
1. Refer to Chapter “Time-out Condition”.
300.8
—
*
1
μs
at 20 MHz clock frequency
n the CSD are two fields to code the asynchronous and the synchronous access delay time:
TAAC, asynchronous access delay
NSAC, maximum number of cycles for receiving and interpreting of a command frame
The value for the CSD field NSAC is calculated from N
SAD
(maximum: 16 cycles) by division with 100
and rounding up to the next integer:
NSAC = [N
SAD
/100] = [16/100]
NSAC = 0x01
The value for the CSD field TAAC is 1 ms:
TAAC = [T
AAD
] = 1 ms
TAAC = 0x0E
For more details on NSAC and TAAC CSD-entries refer to Chapter “Card Specific Data (CSD)”.
References
[1] The MultiMediaCard, System Specification 3.1, MultiMediaCard Association
Number Representations
decimal numbers: 1234, no special characters
hexadecimal numbers: 0xAB, leading 0x, each digit represents 4 bits.
binary numbers (single bit): ‘0’.
binary number (unsigned bit vector): “100100”.
1k is equal to 1024.
1M is equal to 1k * 1k, except the card capacity. In the card capacity, 1M is equal to 10
6
(“Features”
and “Card Specific Data”).
1G is equal to 1M * 1k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HB28D064MM2 | MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte |
| HB28E016MM2 | MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte |
| HB28C048A6 | FLASH ATA Card |
| HB28C048C6 | CompactFlash⑩ |
| HB28C016A6 | FLASH ATA Card |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HB2A102K-S265B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
| HB2A102K-S565B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
| HB2A103K-S565B | 制造商:Hitano Enterprise Corp 功能描述: |
| HB2A122K-S265B | 制造商:Hitano Enterprise Corp 功能描述: |
| HB2A122K-S565B | 制造商:Hitano Enterprise Corp 功能描述:Bulk |
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