ST STM32F412 Reference Manual page 890

Secure digital input/output interface (SDIO)
Bits Identifier
13 ERASE_RESET
12:9 CURRENT_STATE
8 READY_FOR_DATA
7 SWITCH_ERROR
6 Reserved
5 APP_CMD
4 Reserved for SD I/O Card
3 AKE_SEQ_ERROR
2 Reserved for application specific commands
1
Reserved for manufacturer test mode
0
890/1163
Table 169. Card status (continued)
Type Value
'0'= cleared
-
'1'= set
0 = Idle
1 = Ready
2 = Ident
3 = Stby
4 = Tran
S R 5 = Data
6 = Rcv
7 = Prg
8 = Dis
9 = Btst
10-15 = reserved
'0'= not ready
S R
'1' = ready
'0'= no error
E X
'1'= switch error
'0' = Disabled
S R
'1' = Enabled
'0'= no error
E R
'1'= error
RM0402 Rev 6
Description
An erase sequence was cleared before
executing because an out of erase
sequence command was received
(commands other than CMD35, CMD36,
CMD38 or CMD13)
The state of the card when receiving the
command. If the command execution
causes a state change, it will be visible to
the host in the response on the next
command. The four bits are interpreted as
a binary number between 0 and 15.
Corresponds to buffer empty signalling on
the bus
If set, the card did not switch to the
expected mode as requested by the
SWITCH command
The card will expect ACMD, or an
indication that the command has been
interpreted as ACMD
Error in the sequence of the
authentication process
RM0402
Clear
condition
C
B
-
B
C
C