Table 189. NFPGCFG / SMPGCFG Registers
NFPGCFG / SMPGCFG – NF / SMC Device Page Configuration Registers
7
6
5
4
3
2
1
0
NDB3
NDB2
NDB1
NDB0
NDB4
-
-
-
Bit
Bit
Number
Mnemonic Description
Page Data Number
7-3
2-0
NDB4:0
-
Number of data bytes in a page (unit is 512 bytes).
Reserved
The value read from these bits is always 0. Do not set these bits.
Reset Value = 0000 0000b
Table 190. SCFG1 Register
SCFG1 – Sub Configuration Register 1
7
6
5
4
3
2
1
0
-
NUMDEV1 NUMDEV0
PDEV3
PDEV2
PDEV1
PDEV0
SMCEN
Bit
Bit
Number
Mnemonic Description
Reserved
7
-
The value read from this bit is always 0. Do not set this bit.
Nand Flash Device Number
6-5
4-1
NUMDEV1:0
PDEV3:0
Write the number of devices connected (SMC/XD included) minus 1.
Protected Device Configuration Bits
Refer to Table 198 for more details.
SmartMedia/XD Card Enable Bit
0
SMCEN
Set to enable SMC support.
Clear to disable SMC support.
Reset Value = 0001 1110b
Table 191. SCFG2 Register
SCFG2 – Sub Configuration Register 2
7
6
5
4
3
2
1
0
-
-
-
-
-
-
BSIZE1
BSIZE0
Bit
Bit
Number
Mnemonic Description
Reserved
7-2
-
The value read from these bits is always 0. Do not set these bits.
170
AT85C51SND3Bx
7632A–MP3–03/06
ATMEL [ ATMEL ]
