HB288064MM1 Datasheet, PDF (10/79 Pages) Hitachi Semiconductor – MultiMediaCard 64 MByte

HB288064MM1
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
Field
Width CSD-slice Value
Type
CSD structure
CSD_STRUCTURE 2
[127:126] 1
read only
Spec version
SPEC_VERS
4
[125:122] 2
read only
Reserved
—
2
[121:120] 0
read only
Data read access-time-1 TAAC
8
[119:112] 0x0E (1 ms)
read only
Data read access-time-2 in NSAC
CLK cycles (NAC*100)
8
[111:104] 0x01 (100 cycles) read only
Max. data transfer rate
TRAN_SPEED
8
[103:96] 0x2A (20 Mbit/s) read only
Card command classes
CCC
12
[95:84] 0x0FF (class 0, 1, read only
2, 3, 4, 5, 6, 7)
Max. read data block length READ_BLK_LEN
4
[83:80] 0x9 (512 bytes) read only
Partial blocks for read
allowed
READ_BLK_PARTIAL 1
[79:79]
‘1’*¹ (Enabled)
read only
Write block misalignment
WRITE_BLK_MISALIG 1
N
[78:78] ‘0’ (Disabled)
read only
Read block misalignment READ_BLK_MISALIGN 1
[77:77] ‘0’ (Disabled)
read only
DSR implemented
DSR_IMP
1
[76:76] ‘0’ (Disabled)
read only
Reserved
—
2
[75:74] 0
read only
Device size
C_SIZE
12
[73:62] 0x7A7
(64 MByte)*²
read only
Max. read current at V_DD min VDD_R_CURR_MIN 3
Max. read current at V_DD max VDD_R_CURR_MAX 3
Max. write current at V_DD min VDD_W_CURR_MIN 3
Max. write current at V_DD max VDD_W_CURR_MAX 3
Device size multiplier
C_SIZE_MULT
3
[61:59]
[58:56]
[55:53]
[52:50]
[49:47]
0x5 (35 mA)
0x5 (45 mA)
0x5 (35 mA)
0x5 (45 mA)
4 (64 MByte)*³
read only
read only
read only
read only
read only
Erase sector size
SECTOR_SIZE
5
[46:42] 0 (512 Bytes)
read only
Erase group size
ERASE_GRP_SIZE 5
[41:37] 0x0F (8 kByte) read only
10