hb28j128mm3 Renesas Electronics Corporation., hb28j128mm3 Datasheet - Page 16

• Manufacturer Part Number: hb28j128mm3
• Description: Multimediacard 32 Mbyte/64 Mbyte/128 Mbyte/256 Mbyte/512 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
Defines if the configurable driver stage option is integrated on the card or not. If implemented a driver
stage register (DSR) must be implemented also.
DSR Implementation
DSR_IMP
0
1
These Renesas MultiMediaCards' output drivers are not configurable. The parameter DSR_IMP is
permanently assigned to the value ‘0’.
This parameter is used to compute the card capacity. The card capacity is computed from the entries
C_SIZE, C_SIZE_MULT and READ_BLK_LEN as follows:
Where
Therefore, the maximal capacity which can be coded is 4096 * 512 * 2048 = 4 GBytes.
The following table shows the parameters for each card capacity.
Card Capacity
32 MByte
64 MByte
128 MByte
256 MByte
512 MByte
Rev.0.02, Sep.15.2004, page 16 of 89
DSR_IMP
C_SIZE
memory capacity = BLOCKNR * BLOCK_LEN
BLOCKNR = (C_SIZE+1) * MULT
MULT = 2
BLOCK_LEN = 2
C_SIZE_MULT+2
READ_BLK_LEN
C_SIZE
0x7A7
0x7A7
0x7A7
0x7A7
0x7A7
DSR type
No DSR implemented
DSR implemented
C_SIZE_MULT
3
4
5
6
7
(C_SIZE_MULT < 8)
(READ_BLK_LEN < 12)
READ_BLK_LEN
9
9
9
9
9