Bit
Bit
Number
Mnemonic Description
Reserved
7-0
3-2
0
The value read from these bits is always 0.
Second Half Error Id Flag
Id of the error in the second “256-byte” group of the sector.
1: Correctable error.
2: Not correctable error.
SHERRID1-0
FHERRID1-0
3: Not correctable error in the ECC. Anyway, the data is good.
First Half Error Id Flag
Id of the error in the first “256-byte” group of the sector.
1: Correctable error.
1-0
2: Not correctable error.
3: Not correctable error in the ECC. Anyway, the data is good.
Table 201. ECC ERror Identification Byte
7
6
5
4
3
2
1
0
0
0
SHFB2
SHFB1
SHFB0
FHFB2
FHFB1
FHFB0
Bit
Bit
Number
Mnemonic Description
Reserved
7-6
-
The value read from these bits is always 0.
5-3
2-0
SHFB2:0 Second Half Fail Bit Flag
FHFB2:0 First Half Fail Bit Flag
Card Unit
Enable
Smartmedia or XD card management is enabled by setting SMCEN bit in SCFG1 regis-
ter as detailed in Section “Configuration Descriptor” where specific configuration must
also be set.
Card Detect Input
As shown in Figure 82 the SMINS (SMC/XD Card Detect) input implements an internal
pull-up, in order to provide static high level when card is not present in the socket.
SMINS level is reported by SMCD bit(1) in NFSTA.
As soon as SMC is enabled, all level modifications on SMINS input from H to L or from L
to H (card insertion or removal) set SMCTI, the SM Card Toggle Interrupt flag in NFINT.
Note:
1. SMCD bit is not relevant until SMC management is enabled.
Figure 82. Card Detection Input Block Diagram
IOVDD
RPU
SMINS
SMCD
NFSTA.7
SMCTI
NFINT.4
182
AT85C51SND3Bx
7632A–MP3–03/06
ATMEL [ ATMEL ]
