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”
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