Specifications

©Copyright 2001-2013 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 4.10
147
Figure 5-21 : Power Down Mode Entering / Exiting Sequence Flow
5.8.1.6 General Information of Power Management Function
Table 5-27 shows an example of General Information for only Power Management Function is assigned
to Extension 1 ("Number of Extended Functions" is set to 1 and "Pointer to Next Extension" is set to
0000h). Standard Code 0001h for Power Management Function (Defined by Table 5-25) is set to SFC.
FCC is not used (set to 0000h). FMC, FMN and PFC shall be set to 0 because this function is
manufacturer unrelated. FN is set to "PMF" (ASCII code) and filled with 0 for the rest of this field.
Table 5-27 : General Information of Power Management Function
000h Structure Revision 2 bytes 0000h The first revision of General Information
002h General Information Length 2 bytes 0040h Data Length of this information
004h Number of Extensions 1 byte 01h Only Power Management Function is implemented
005h-0Fh Reserved 11 byte all 0 Set to all 0 (16 bytes header area)
010h Extension 1
Standard Function Code (SFC)
2 bytes 0001h Code of Power Management Function
012h Extension 1
Function Capability Code (FCC)
2 bytes 0000h FCC is not used
014h Extension 1
Function Manufacturer Code (FMC)
2 bytes 0000h Manufacturer unrelated
016h Extension 1
Function Manufacturer Name (FMN)
16 bytes all 0 Manufacturer unrelated
026h Extension 1
Particular Function Code (PFC)
2 bytes 0000h Manufacturer unrelated
028h Extension 1
Function Name (FN)
16 bytes "PMF" ASCII + all 0
"PMF" = 00000000_00000000_00000000_00464D50h
038h Pointer to Next Extension 2 bytes 0000h End of General Information
03Ah Number of Register Sets (=X) 1 byte 01h One Register Set
03Bh Reserved 1 byte 00h
03Ch Register Set Address 1 4 bytes 0004_
0000h
Top Address of FNO=1
040h-1FFh Unused Area all 0
Application Notes for Host designers
1) The power consumption level during Power Down Mode is not specified and it varies
dependent on Card products.
2) Host designers should consider that recovery time from Power Down Mode is up to 1 second.
CMD48 Read PDMS
Base + 1
Check PDMS
CMD49 Set PDMN=1
Base + 2
Check PDMR
CMD48 Read PDMR
Base + 1
PDMS=0
PDMR=0
PDMR=1
Entering Power Down Mode
Wait during Busy
PDMS=1
End
CMD48 Read PDMR
Base + 1
CMD49 Set PDMN=0
Base + 2
Check PDMR
CMD48 Read PDMR
Base + 1
PDMR=0
PDMR=1
PDMR=0
Exiting Power Down Mode
Wait during Busy
PDMR=1
End
Check PDMR