MC56U032NCFA Samsung Semiconductor, Inc., MC56U032NCFA Datasheet - Page 20
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MC56U032NCFA
Manufacturer Part Number
MC56U032NCFA
Description
Flash Card
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.MC56U032NCFA.pdf
(66 pages)
- Current page: 20 of 66
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4.5 Registers
4.5.1 Operation Condition Register (OCR)
Table 4-5 OCR Fields
MultiMediaCard
Table 4-3 MultiMediaCard Information Registers
CID and RCA are used for identifying and addressing MultiMediaCard. CSD contains the card specific
data record. This record is a set of information fields to define the operation conditions of the
MultiMediaCard.
For the user the CID and the OCR 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
Table 4-4 Information Registers in SPI Mode
This register indicates supported voltage range of MultiMediaCards. It is a 32 bit wide register and for
read only.
Name
OCR
RCA
CSD
CID
Name
OCR
RCA
CSD
CID
Width
128
128
Width (bytes)
32
16
16
16
4
TM
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
Available
Yes
Yes
Yes
Type
No
Card identification data (serial number,
manufacturer ID etc.)
operation conditions
Operation condition register
Card specific data, information about the card
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
Description
20
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