SMS512DFA5E NUMONYX, SMS512DFA5E Datasheet - Page 20

• Manufacturer Part Number: SMS512DFA5E
• Description: MICROSD CARD SMS 512MB FLASH MEM
• Manufacturer: NUMONYX

Specifications of SMS512DFA5E

• Memory Size: 512MB
• Memory Type: SD (Secure Digital)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Secure digital memory card interface
Figure 11. SD memory card state diagram (card identification mode)
1. The card returns busy when:
2. For the host compliant to physical specifications version 2.00, it is mandatory to send CMD8 before ACMD41.
3.4.2
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- the card executes an internal initialization process
- the card is an high capacity SD memory card and the host does not support high capacity
This means that CMD8 is mandatory to initialize high capacity SD memory card.
No response (invalid command),
SPI operation
mode
must be a MultiMediaCard
Card identification mode
Data transfer mode
Data transfer mode
Cards enter the data transfer mode once their relative card addresses (RCA) have been
published.
The host enters the data transfer mode after identifying all the cards on the bus.
The host issues SEND_CSD (CMD9) to obtain the contents of the card specific data (CSD)
register for each card. The CSD register contains information like the block length and the
card storage.
Until the host knows the contents of all the CSD registers, the f
f
The broadcast command SET_DSR (CMD4) configures the driver stages of all identified
cards. It programs their driver stage registers (DSR) according to the application bus layout
(length), the number of cards on the bus and the data transfer frequency. The clock rate is
changed from f
the host.
OD
because some cards may have operating frequency limitations.
Start MultiMediaCard
initialization process
starting at CMD1
CS asserted ('0')
OD
CMD0 +
voltage range (1)
to f
Card is busy or
Card responds
with new RCA
host omitted
PP
at that point. The SET_DSR command is an option for the card and
Identification state
Standby state
Ready state
Power-on
Idle state
ACMD41
CMD3
CMD2
(stby)
(ready)
(ident)
(Idle)
CMD8
Card with
incompatible
voltage range
CMD0
and returns to idle state (2)
CMD3
The card can not operate
under supplied voltage,
Card responds
with new RCA
does not respond
PP
Inactive state
clock rate must remain at
except for (ina)
from all states
(ina)
from all states in
data transfer mode
SMSxxxDF
CMD15
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