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1745D–ATARM–04-Nov-05
AT91M55800A
17.2.1 Chip ID Register
Register Name: SF_CIDR
Access Type: Read-only
Offset: 0x00
• VERSION: Version of the chip (Code Label SF_VERSION)
This value is incremented by one with each new version of the chip (from zero to a maximum value of 31).
• NVPSIZ: Nonvolatile Program Memory Size
• NVDSIZ: Nonvolatile Data Memory Size
• VDSIZ: Volatile Data Memory Size
31 30 29 28 27 26 25 24
EXT NVPTYP ARCH
23 22 21 20 19 18 17 16
ARCH VDSIZ
15 14 13 12 11 10 9 8
NVDSIZ NVPSIZ
76543210
0 1 0 VERSION
NVPSIZ Size Code Label: SF_NVPSIZ
0 0 0 0 None SF_NVPSIZ_NONE
0 0 1 1 32K Bytes SF_NVPSIZ_32K
0 1 0 1 64K Bytes SF_NVP_SIZ_64K
0 1 1 1 128K Bytes SF_NVP_SIZ_128K
1 0 0 1 256K Bytes SF_NVP_SIZ_256K
Others Reserved –
NVDSIZ
Size Code Label: SF_NVDSIZ
0 0 0 0 None SF_NVDSIZ_NONE
Others Reserved –
VDSIZ Size
Code Label: SF_VDSIZ
0 0 0 0 None SF_VDSIZ_NONE
0 0 0 1 1K Bytes SF_VDSIZ_1K
0 0 1 0 2K Bytes SF_VDSIZ_2K
0 1 0 0 4K Bytes SF_VDSIZ_4K
1 0 0 0 8K Bytes SF_VDSIZ_8K
Others Reserved –