Table 159. Speed Class Code Field; Table 160. Performance Move Field - STMicroelectronics STM32F405 Reference Manual

RM0090
SIZE_OF_PROTECTED_AREA
Setting this field differs between standard- and high-capacity cards. In the case of a
standard-capacity card, the capacity of protected area is calculated as follows:
Protected area = SIZE_OF_PROTECTED_AREA_* MULT * BLOCK_LEN.
SIZE_OF_PROTECTED_AREA is specified by the unit in MULT*BLOCK_LEN.
In the case of a high-capacity card, the capacity of protected area is specified in this field:
Protected area = SIZE_OF_PROTECTED_AREA
SIZE_OF_PROTECTED_AREA is specified by the unit in bytes.
SPEED_CLASS
This 8-bit field indicates the speed class and the value can be calculated by P
P is the write performance).
W
00h
01h
02h
03h
04h – FFh
PERFORMANCE_MOVE
This 8-bit field indicates Pm (performance move) and the value can be set by 1 [MB/sec]
steps. If the card does not move used RUs (recording units), Pm should be considered as
infinity. Setting the field to FFh means infinity.
PERFORMANCE_MOVE
00h
01h
02h
---------
FEh
FFh

Table 159. Speed class code field

SPEED_CLASS

Table 160. Performance move field

DocID018909 Rev 11
Secure digital input/output interface (SDIO)
Value definition
Class 0
Class 2
Class 4
Class 6
Reserved
Value definition
Not defined
1 [MB/sec]
02h 2 [MB/sec]
---------
254 [MB/sec]
Infinity
/2 (where
W
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