Table 194. Performance Move Field; Table 195. Au_Size Field; Table 196. Maximum Au Size - ST STM32F423 Reference Manual

Secure digital input/output interface (SDIO)
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
AU_SIZE
This 4-bit field indicates the AU size and the value can be selected in the power of 2 base
from 16 KB.
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
Ah – Fh
The maximum AU size, which depends on the card capacity, is defined in
card can be set to any AU size between RU size and maximum AU size.
Capacity
Maximum AU Size
1056/1324

Table 194. Performance move field

Table 195. AU_SIZE field

AU_SIZE

Table 196. Maximum AU size

16 MB-64 MB
512 KB
RM0430 Rev 8
Value definition
Not defined
1 [MB/sec]
02h 2 [MB/sec]
---------
254 [MB/sec]
Infinity
Value definition
Not defined
16 KB
32 KB
64 KB
128 KB
256 KB
512 KB
1 MB
2 MB
4 MB
Reserved
128 MB-256 MB
1 MB
RM0430
Table 196. The
512 MB 1 GB-32 GB
2 MB 4 MB