hb28b128mm2 Renesas Electronics Corporation., hb28b128mm2 Datasheet - Page 13

• Manufacturer Part Number: hb28b128mm2
• Description: Multimediacard 16 Mbyte/32 Mbyte/64 Mbyte/128 Mbyte
• Manufacturer: Renesas Electronics Corporation.

Card Specific Data (CSD)
The card specific data register describes how to access the card content. The CSD defines card operating
parameters like maximum data access time, data transfer speed.
The CSD Fields
Name
CSD structure
Spec version
Reserved
Data read access-time-1
Data read access-time-2 in
CLK cycles (NSAC*100)
Max. data transfer rate
Card command classes
Max. read data block length READ_BLK_LEN
Partial blocks for read
allowed
Write block misalignment
Read block misalignment
DSR implemented
Reserved
Device size
Max. read current at V
Max. read current at V
Max. write current at V
Max. write current at V
Device size multiplier
Erase group size
Erase group size multiplier
DD
DD
DD
DD
min VDD_R_CURR_MIN
max VDD_R_CURR_MAX
min VDD_W_CURR_MIN
max VDD_W_CURR_MAX
Field
SPEC_VERS
—
TAAC
NSAC
TRAN_SPEED
CCC
READ_BLK_PARTIAL
WRITE_BLK_MISALIG
N
READ_BLK_MISALIGN 1
DSR_IMP
—
C_SIZE
C_SIZE_MULT
ERASE_GRP_SIZE
ERASE_GRP_MULT
CSD_STRUCTURE
Width
2
4
2
8
8
8
12
4
1
1
1
2
12
3
3
3
3
3
5
5
HB28H016/D032/B064/B128MM2
CSD-slice Value
[125:122]
[121:120]
[119:112]
[111:104]
[95:84]
[83:80]
[79:79]
[78:78]
[77:77]
[76:76]
[75:74]
[73:62]
[61:59]
[58:56]
[55:53]
[52:50]
[49:47]
[127:126]
[103:96]
[46:42]
[41:37]
Rev.5.0, Jan. 2003, page 11 of 88
“10”
“0011”
0x0E (1 ms)
2, 3, 4, 5, 6, 7)
‘1’ (Enabled)
‘0’ (Disabled)
‘0’ (Disabled)
‘0’ (Disabled)
*
*
*2
*
*
*
0
0x01 (100 cycles) read only
0x2A (20 Mbit/s)
0x0FF (class 0, 1,
0x9 (512 bytes)
0
0
0x0F
1
2
2
2
3
Type
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only
read only