hb288064mm1 Renesas Electronics Corporation., hb288064mm1 Datasheet - Page 8

• Manufacturer Part Number: hb288064mm1
• Description: Multimediacard 64 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB288064MM1
Registers
The HB288064MM1 contains the following information registers:
Name
OCR
CID
RCA
CSD
CID and RCA are used for identifying and addressing the HB288064MM1. The third register contains the
card specific data record. This record is a set of information fields to define the operation conditions of the
HB288064MM1.
For the user the CID and the CSD are read only registers. They are read out by special commands (refer to
Chapter “Commands”). The RCA registers are write only registers. Unlike CID and CSD, RCA looses its
contents after powering down the card. Its value is reassigned in each initialization cycle. The
MultiMediaCard registers usage in SPI mode is summarized in Table “MultiMediaCard Registers in SPI
Mode”:
MultiMediaCard Registers in SPI Mode
Name
OCR
CID
RCA
CSD
8
Width
32
128
16
128
Available in SPI mode Width (Bytes)
Yes
Yes
No
Yes
Type
Programmed by the
manufacturer.
Read only for user
Programmed by the
manufacturer.
Read only for user
Programmed during
initialization, not readable
Programmed by the
manufacturer. Partially
programmable by the user.
32
16
16
Description
Supported voltage range, card power up status bit
Card identification number, card individual number for
identification.
Relative card address, local system address of a card,
dynamically assigned by the host during initialization.
Card specific data, information about the card operation
conditions.
Description
Operation condition register.
Card identification data (serial number, manufacturer ID
etc.)
Card specific data, information about the card operation
conditions.