HB28K032MM3 Datasheet, PDF (16/91 Pages) Renesas Technology Corp – MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
• DSR_IMP
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
DSR type
No DSR implemented
DSR implemented
These Renesas MultiMediaCards' output drivers are not configurable. The parameter DSR_IMP is
permanently assigned to the value ‘0’.
• C_SIZE
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:
memory capacity = BLOCKNR * BLOCK_LEN
Where
BLOCKNR = (C_SIZE+1) * MULT
MULT = 2^{C_SIZE_MULT+2}
BLOCK_LEN = 2^READ_BLK_LEN
(C_SIZE_MULT < 8)
(READ_BLK_LEN < 12)
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
C_SIZE
0x7A7
0x7A7
0x7A7
0x7A7
0x7A7
C_SIZE_MULT
3
4
5
6
7
READ_BLK_LEN
9
9
9
9
9
Rev.0.02, Sep.15.2004, page 16 of 89