Chapter 3 – SD Card Interface Description
Revision 2.2
SD Card Product Manual
© 2004 SanDisk Corporation
3-14
12/08/04
Field Width
Cell
Type
CSD
Slice
CSD Value
CSD Code
Description
max.
VDD_W_
CURR_MIN
3 R [55:53]
100
mA
111b Max.
write
current @VDD
min.
VDD_W_
CURR_MAX
3 R [52:50]
80
mA
110b Max.
write
current @VDD
max.
C_SIZE_
MULT
3 R [49:47]
2G=2048
1G=1024
512=512
256=256
128=128
64=64
32=32
16=16
0x07
0x07
0x06
0x05
0x04
0x03
0x03
0x03
Device size
multiplier
ERASE_BLK_
EN
1 R [46:56
Yes
1b
Erase
single
block enable
SECTOR_
SIZE
7 R [45:39]
32
blocks 0011111b Erase
sector
size
WP_GRP_
SIZE
7 R [38:32]
128
sectors 1111111b Write
protect
group size
WP_GRP_
ENABLE
1 R {31:31]
Yes
1b
Write
protect
group enable
Reserved 2 R [30:29]
---
0b
Reserved
for
MMC
compatibility
R2W_
FACTOR
3 R [28:26]
x16
0100b Write
speed
factor
WRITE_BL_
LEN
4
R
[25:22]
2G
Up to 1G
Ah
9h
Max. write data
block length
WRITE_BL
PARTIAL
1 R [21:21]
No
0
Partial
blocks
for write allowed
--- 5
R
[20:16]
---
00000b
Reserved
FILE_
FORMAT_
GRP
1 R/W
(1)
[15:15] 0
0b
File
format
group
COPY 1
R/W
(1)
[14:14]
Not original
1b
Copy flag (OTP)
PERM_
WRITE_
PROTECT
1 R/W
(1)
[13:13] Not
protected 0b
Permanent
write protection
TMP_WRITE_
PROTECT
1 R/W
[12:12]
Not
protected
0b
Temporary
write
protection
FILE_
FORMAT
2 R/W
(1)
[11:10] HD
w/partition 00b
File
format
Reserved 2 2 R/W
[9:8]
---
Reserved
CRC 7
R/W
[7:1]
---
CRC7
CRC
--- 1
---
[0:0]
---
1b
Not
used,
always “1”