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參數(shù)資料
| 型號： | romr0002 |
| 廠商： | SIEMENS AG |
| 英文描述： | MultiMediaCard R0002 2 Mbyte ROM(多媒體卡 R0002 2 Mbyte ROM) |
| 中文描述： | 多媒體R0002 2字節(jié)的光盤（多媒體卡R0002 2字節(jié)光盤） |
| 文件頁數(shù)： | 11/41頁 |
| 文件大?。?/td> | 207K |
| 代理商： | ROMR0002 |
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Siemens
Product Manual R0002
Semiconductor Group
11
3.1
All CSD fields are read only for the user. All “don’t care” tagged fields are zero.
The following section describes the CSD fields and their values for the R0002:
CSD_STRUCTURE
The CSD version of the R0002 is related to the CSD version 1.1 as defined in “MultiMediaCard sys-
tem specification, Version 1.4”. The parameter CSD_STRUCTURE is permanently assigned to the
value 1.
MMC_PROT
Defines the MultiMediaCard protocol version supported by the card. It includes the commands set
definition and the definition of the card responses. The card identification procedure is compatible
for all protocol versions.
The MultiMediaCard protocol version of the R0002 is related to the “MultiMediaCard system specifi-
cation, Version 1.4”. The parameter MMC_PROT is permanently assigned to the value 1.
TAAC
Defines the asynchronous data access time:
max. write data block length
WRITE_BLK_LEN
4
[25:22]
don’t care
partial blocks for write allowed
WRITE_BLK_PARTIAL
1
[21:21]
don’t care
reserved
-
5
[20:16]
don’t care
reserved
-
1
[15:15]
don’t care
copy flag (OTP)
permanent write protection
temporary write protection
COPY
PERM_WRITE_PROTECT
TMP_WRITE_PROTECT
1
1
1
[14:14]
[13:13]
[12:12]
don’t care
1
1
reserved
ECC code
CRC
-
ECC
CRC
2
2
7
[11:10]
[9:8]
[7:1]
don’t care
0
0x69
not used, always 1
-
1
[0:0]
1
CSD_STRUCTURE
CSD register structure
“01”
CSD version No. 1.1
Table 5: CSD register structure
MMC_PROT
MultiMediaCard protocol version
“0001”
MultiMediaCard protocol version 1.4
Table 6: MultiMediaCard protocol version
TAAC bit
Description
Values
2:0
time unit
0=1ns, 1=10ns, 2=100ns, 3=1
μ
s, 4=10
μ
s, 5=100
μ
s, 6=1ms,
7=10ms
Table 7: TAAC access time definition
Name
Field
Width
CSD-
slice
Value
Table 4: The CSD fields
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