Datasheet

377
11011B–ATARM–21-Feb-12
SAM3N
377
11011B–ATARM–21-Feb-12
SAM3N
25. Chip Identifier (CHIPID)
25.1 Description
Chip Identifier registers permit recognition of the device and its revision. These registers provide
the sizes and types of the on-chip memories, as well as the set of embedded peripherals.
Two chip identifier registers are embedded: CHIPID_CIDR (Chip ID Register) and CHIPID_EXID
(Extension ID). Both registers contain a hard-wired value that is read-only. The first register con-
tains the following fields:
• EXT - shows the use of the extension identifier register
• NVPTYP and NVPSIZ - identifies the type of embedded non-volatile memory and its size
• ARCH - identifies the set of embedded peripherals
• SRAMSIZ - indicates the size of the embedded SRAM
• EPROC - indicates the embedded ARM processor
• VERSION - gives the revision of the silicon
The second register is device-dependent and reads 0 if the bit EXT is 0.
Table 25-1. ATSAM3N Chip IDs Register
Chip Name CHIPID_CIDR CHIPID_EXID
ATSAM3N4C (Rev A) 0x29540960 0x0
ATSAM3N2C (Rev A) 0x29590760 0x0
ATSAM3N1C (Rev A) 0x29580560 0x0
ATSAM3N4B (Rev A) 0x29440960 0x0
ATSAM3N2B (Rev A) 0x29490760 0x0
ATSAM3N1B (Rev A) 0x29480560 0x0
ATSAM3N4A (Rev A) 0x29340960 0x0
ATSAM3N2A (Rev A) 0x29390760 0x0
ATSAM3N1A (Rev A) 0x29380560 0x0
ATSAM3N1C (Rev B) 0x29580561 0x0
ATSAM3N1B (Rev B) 0x29480561 0x0
ATSAM3N1A (Rev B) 0x29380561 0x0
ATSAM3N0C (Rev A) 0x295 80361 0x0
ATSAM3N0B (Rev A) 0x294 80361 0x0
ATSAM3N0A (Rev A) 0x293 80361 0x0
ATSAM3N00B (Rev A) 0x294 50261 0x0
ATSAM3N00A (Rev A) 0x293 50261 0x0