Timing Values - SanDisk SDSDB-016G-A11 Product Manual

Revision 2.2
Stop Transmission Received after Last Data Block-Card Busy Programming
CMD S T
S L
DAT
Stop Transmission Received after Last Data Block-Card becomes Busy
Host Command
CMD S T
Z Z Z Z Z
DAT
Erase, Set and Clear Write Protect Timing
The host must first tag the start (CMD32) and end (CMD33) addresses of the range to be
erased. The erase command (CMD38), once issued, will erase all the selected write blocks.
Similarly, set and clear write protect commands start a programming operation as well. The
card will signal "busy" (by pulling the DAT line low) for the duration of the erase or
programming operation. The bus transaction timings are the same as given for stop tran
command in the "Stop Transmission Received after Last Data Block-Card Busy
Programming" diagram above.
Re-selecting a Busy Card
When a busy card, which is currently in the dis state, is reselected it will reinstate its busy
signaling on the data line. The timing diagram for this command/response/busy transaction
is the same as given for stop tran command in the "Stop Transmission Received after Last
Data Block-Card becomes Busy" diagram above.
4.13 Timing Values
Table 4-24 defines all timing values.
Table 4-24
Value
N
CR
N
ID
N
AC
N
RC
N
CC
N
WR
Note-The host calculates the maximum read access time as follows:
N (max)= 100 ((TAAC * f
AC
f is the interface clock rate and TAAC & NSAC are given in the CSD Register.
PP
© 2004 SanDisk Corporation
N Cycles
Host Command
CR
Content E Z Z P
CRC
******************************************************************
N Cycles
CR
Content CRC E Z Z P
Z Z Z Z Z Z S

Timing Values

Min.
2
5
2
8
8
2
) + (100 * NSAC)) ;
PP
4-46
Chapter 4 - SD Card Protocol Description
SanDisk SD Card Product Manual
Card Response
*** P S T Content CRC
Card is Programming
Card Response
*** P S T Content CRC
Card is Programming
L *********************
Max.
64 Clock cycles
5 Clock cycles
See Note Clock cycles
--- Clock cycles
--- Clock cycles
--- Clock cycles
Host Command
E S T Content
L E Z Z Z Z Z Z Z
Host Command
E S T Content
L E Z Z Z Z Z Z Z
Unit
12/08/04
Z
Z