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參數資料
| 型號： | romr0008 |
| 廠商： | SIEMENS AG |
| 英文描述： | MultiMediaCard R0008 8 Mbyte ROM(多媒體卡 R0002 8 Mbyte ROM) |
| 中文描述： | 多媒體R0008 8字節的光盤（多媒體卡R0002 8字節光盤） |
| 文件頁數： | 10/41頁 |
| 文件大小： | 208K |
| 代理商： | ROMR0008 |
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Siemens
Product Manual R0008
Semiconductor Group
11
3.1
identification procedure. The default value of the RCA register is 0x0001. The value 0x0000 is
reserved to set all cards in Standby State with the command SELECT_DESELECT_CARD (CMD7).
The RCA is programmed with the command SET_RELATIVE_ADDRESS (CMD3) during the initial-
ization procedure. The content of this register is lost after power down. The default value is assigned
when an internal reset is applied by the power up detection unit of the R0008.
5.3
Card specific data (CSD)
The card specific data register describes how to access the card content. The CSD defines the data
format, error correction type, maximum data access time, data transfer speed, whether the wide or
standard bus is implemented etc.
Name
Field
Width
CSD-
slice
Value
CSD structure
MultiMediaCard protocol
version
CSD_STRUCTURE
MMC_PROT
2
4
[127:126]
[125:122]
1
1
reserved
data read access-time-1
-
TAAC
2
8
[121:120]
[119:112]
don’t care
0x6A
(0.6
μ
s)
0x03
(300 cycles)
0x2A
(20 Mbit/s)
0x007
(class 0, 1, 2)
0xB
(2048 bytes)
‘1’
data read access-time-2 in CLK
cycles (NSAC*100)
max. data transfer rate
NSAC
8
[111:104]
TRAN_SPEED
8
[103:96]
card command classes
CCC
12
[95:84]
max. read data block length
READ_BLK_LEN
4
[83:80]
partial blocks for read allowed
READ_BLK_PARTIAL
1
[79:79]
write block misalignment
read block misalignment
DSR implemented
WRITE_BLK_MISALIGN
READ_BLK_MISALIGN
DSR_IMP
1
1
1
[78:78]
[77:77]
[76:76]
don’t care
‘1’
‘0’
reserved
device size
max. read current @V
DD
min
-
C_SIZE
VDD_R_CURR_MIN
2
[75:74]
[73:62]
[61:59]
don’t care
962
0x3
(10mA)
0x3
(25mA)
12
3
max. read current @V
DD
max
VDD_R_CURR_MAX
3
[58:56]
max. write current @V
DD
min
max. write current @V
DD
max
device size multiplier
VDD_W_CURR_MIN
3
[55:53]
don’t care
VDD_W_CURR_MAX
C_SIZE_MULT
3
3
[52:50]
[49:47]
don’t care
0
erase sector size
SECTOR_SIZE
5
[46:42]
don’t care
erase group size
ERASE_GRP_SIZE
5
[41:37]
don’t care
write protect group size
WP_GRP_SIZE
5
[36:32]
don’t care
write protect group enable
WP_GRP_ENABLE
1
[31:31]
don’t care
manufacturer default ECC
DEFAULT_ECC
2
[30:29]
don’t care
write speed factor
R2W_FACTOR
3
[28:26]
don’t care
Table 4: The CSD fields
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