SDMJ-32 SanDisk, SDMJ-32 Datasheet - Page 62

• Manufacturer Part Number: SDMJ-32
• Manufacturer: SanDisk
• Type: MultiMedia Cardr

Specifications of SDMJ-32

• Density: 32MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Package Type: MMC
• Mounting: Socket
• Pin Count: 7
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Programmable: Yes
• Lead Free Status / RoHS Status: Compliant

Revision 1.3
© 2005 SanDisk Corporation
4.9
Data Read
Last Host Command—Next Host Command Timing
After the last command has been sent, the host can continue sending the next command
after at least N
have a response.
Timing CMD
In the case where the CMD
response by any card, then the next CMD
N
Single Block Read
The host selects one card for data read operation by CMD7 and sets the valid block length
for block-oriented data transfer by CMD16. The basic bus timing for a read operation is
shown in the Transfer of Single Block Read timing diagram. The sequence starts with a
single block read command, CMD17 that specifies the start address in the argument field.
The response is sent on the CMD line as usual.
Transfer of Single Block Read
Data transmission from the card starts after the access time delay N
end bit of the read command. After the last data bit, the CRC check bits are suffixed to
allow the host to check for transmission errors.
Multiple Block Read
In multiple block read mode, the card sends a continuous flow of data blocks following the
initial host read command. The data flow is terminated by a stop transmission command,
CMD12. The Timing of Multiple Block Read Command timing diagram describes the
timing of the data blocks, and the Timing of Stop Command (CMD12,Data Transfer Mode)
timing diagram describes the response to a stop command. The data transmission stops two
clock cycles after the end bit of the stop command.
CMD S T
DAT Z Z
CMD S T
CC
+136 (the length of the R2 response) clock periods.
Z
n
Content
End to CMD
CC
Host Command
Content
****
clock periods. This timing is relevant for any host command that does not
Z Z Z
CRC
n+1
CRC
n
Start (all modes)
command was a last acquisition command with no further
E Z
Z Z
E Z
4-24
Z P
Z
P
Cycles
N
n+1
N
AC
CC
MultiMediaCard/RS-MultiMediaCard Product Manual
***
******
command is allowed to follow after at least
Cycles
Cycles
**********
Chapter 4 – MultiMediaCard Protocol Description
P S T
Z S T
P S D
Content
Response
Read Data
Host Command
Content
D
AC
D
CRC
beginning from the
***
CRC
E
Z
04/22/05
E