Specifications

©Copyright 2001-2013 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 4.10
48
Check function
Switch function
CMD6
Res
CMD
DAT
CMD6
CMD
DAT
Res
Current function Switched function
Status Data
Card internal
execution
Function change timing: within 8
clocks
Card internal
execution
Status Data
(Mode=0)
(Mode=1)
Figure 4-14: Use of Switch Command
CMD6 supports six function groups, and each function group supports sixteen branches (functions).
Only one function can be chosen and active in a given function group. Function 0 in each function
group is the default function (compatible with Spec. 1.01).
CMD6 can be used in two modes:
• Mode 0 (Check function) is used to query if the card supports a specific function or functions.
• Mode 1 (set function) is used to switch the functionality of the card.