SDMJ-32 SanDisk, SDMJ-32 Datasheet - Page 85

• 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
5.23.3
Data Write
The Stop Transmission command may be sent asynchronously to the data transmitted out
of the card and may overlap the data block. In this case the card will stop sending the data
and transmit the response token as well. The delay between command and response is
standard N
is allowed up to two clocks to stop data transmission.
The timing for de-asserting the CS signal after the last card response is identical to a
standard command/response transaction.
Reading the CSD Register
The following timing diagram describes the SEND_CSD command bus transaction. The
timeout values between the response and the data block are N
unknown.
Figure 5-26
This section provides valuable information on the Data Write function.
Single Block Write
The host may de-select a card by raising the CS at any time during the card busy period.
(Refer to the given timing diagram.) The card will release the DataOut line one clock after
the CS going high. To check if the card is still busy, it needs to be re-selected by asserting
the CS signal (set to low). The card will resume the busy signal (pulling DataOut low) one
clock cycle after the falling edge of CS.
Figure 5-27
Multiple Block Write
The timing of the multiple block write transaction starting from the command up to the first
data block is identical to the single block write. The figure below describes the timing
between the data blocks of a multiple block write transaction. Timing of the ‘Stop Tran’
token is identical to a standard data block. After the card receives the Stop Transmission
token, the data on the DataOut line is undefined for one byte (NBR), after which a Busy
token may appear. The host may de-select and re-select the card during every busy period
between the data blocks. Timing for toggling the CS signal is identical to the Single block
write transaction.
CS
DataIn
DataOut
CS
DataIn
DataOut
H
X
Z
H
X
Z
L L L
H
H H H
Z
L
H
Z
CR
N
N
CS
H
CS
H
H
clocks. The first byte, however, is not guaranteed to be all set to ‘1.’ The card
H
H
H
H
H
H
Write Command
Read Command
H
Read CSD Register Timing
Single Block Write Timing
*******************
********
********
H H H
H H H H
H
H H
N
N
CR
H
CR
H
H
5-20
H
H
Card Resp
H
*******************
H
H
H H H H
Card Resp
MultiMediaCard/RS-MultiMediaCard Product Manual
H
N
WR
H
H
H
*******************
Data Block
H
H
H H
L
H
N
L
H
CX
DataResp
H H
L
H
CX
L
H
because the N
Data Block
L
H
L
H
Busy
N
EC
L
H
Chapter 5 –SPI Mode
L
H
L
H
H H
H
H
X
L
N
N
L
EC
H
H
DS
X
Z
L
H
H
H
X
Z
AC
H
X
H Z
L
H
Z
remains
04/21/05
H
X
Busy
L
H
H
X
Z
L
H
H
X
Z
L
H
H