SMS512DFA5E NUMONYX, SMS512DFA5E Datasheet - Page 39

• 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

SMSxxxDF
6.1.5
Figure 22. Command sequence (all modes)
6.2
6.2.1
Figure 23. Single Block Read command
6.2.2
CMD
CMD
DAT
Last host command, next host command timings
The host can send a new command N
shown in
Data read
Single block read
The host selects one card for the data read operation by issuing CMD7, and sets the valid
block length for oriented data transfer by issuing CMD16.
basing bus read operation. The sequence starts with a Single Block Read command
(CMD17) which specifies the start address in the argument field. The response is sent on
the CMD line.
Data transmission from the card starts N
N
check for transmission errors.
Multiple block read
In multiple block read mode, the card responds to the read command from the host by
sending a continuous flow of data blocks. The data flow is terminated by a
STOP_TRANSMISSION command (CMD12).
command followed by the data blocks and
STOP_TRANSMISSION command. The data transmission stops two clock cycles after the
end bit of the STOP_TRANSMISSION command.
S
S
Z
AC
T
T
Z
is the access time. CRC check bits are appended to the data bits to allow the host to
Z
Host command
Host command
Figure
CONTENT
CONTENT
****
22.
Z
Z
CRC
CRC E
Z
E
Z
Z
Z
Z
N
N
Z
Z
CC
CR
******
P
P
cycles
cycles
CC
***
N
AC
AC
clock cycles after sending the previous one as
Figure
cycles
Z
P S
**********
after the end bit of the read command, where
S
Figure 24
T
T
25, the response to a
Host command
CONTENT
CONTENT
P S D
Response
describes the Multiple Block Read
Figure 23
Read data
D D
CRC E
CRC E
shows the timings for a
***
ai10050
Timings
ai10049
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