Datasheet
21
AT32UC3A
9. Memories
9.1 Embedded Memories
• Internal High-Speed Flash
– 512 KBytes (AT32UC3A0512, AT32UC3A1512)
– 256 KBytes (AT32UC3A0256, AT32UC3A1256)
– 128 KBytes (AT32UC3A1128, AT32UC3A2128)
- 0 Wait State Access at up to 33 MHz in Worst Case Conditions
- 1 Wait State Access at up to 66 MHz in Worst Case Conditions
- Pipelined Flash Architecture, allowing burst reads from sequential Flash locations, hiding
penalty of 1 wait state access
- Pipelined Flash Architecture typically reduces the cycle penalty of 1 wait state operation
to only 15% compared to 0 wait state operation
- 100 000 Write Cycles, 15-year Data Retention Capability
- 4 ms Page Programming Time, 8 ms Chip Erase Time
- Sector Lock Capabilities, Bootloader Protection, Security Bit
- 32 Fuses, Erased During Chip Erase
- User Page For Data To Be Preserved During Chip Erase
• Internal High-Speed SRAM, Single-cycle access at full speed
– 64 KBytes (AT32UC3A0512, AT32UC3A0256, AT32UC3A1512, AT32UC3A1256)
– 32KBytes (AT32UC3A1128)
9.2 Physical Memory Map
The system bus is implemented as a bus matrix. All system bus addresses are fixed, and they
are never remapped in any way, not even in boot. Note that AVR32 UC CPU uses unsegmented
translation, as described in the AVR32 Architecture Manual. The 32-bit physical address space
is mapped as follows:
Table 9-1. AT32UC3A Physical Memory Map
Device Start Address
Size
AT32UC3A0512 AT32UC3A1512 AT32UC3A0256 AT32UC3A1256 AT32UC3A0128 AT32UC3A1128
Embedded SRAM 0x0000_0000 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte 32 Kbyte 32 Kbyte
Embedded Flash 0x8000_0000 512 Kbyte 512 Kbyte 256 Kbyte 256 Kbyte 128 Kbyte 128 Kbyte
EBI SRAM CS0 0xC000_0000 16 Mbyte - 16 Mbyte - 16 Mbyte -
EBI SRAM CS2 0xC800_0000 16 Mbyte - 16 Mbyte - 16 Mbyte -
EBI SRAM CS3 0xCC00_0000 16 Mbyte - 16 Mbyte - 16 Mbyte -
EBI SRAM CS1
/SDRAM CS0
0xD000_0000 128 Mbyte - 128 Mbyte - 128 Mbyte -
USB
Configuration
0xE000_0000 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte
HSB-PB Bridge A 0xFFFE_0000 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte 64 Kbyte
HSB-PB Bridge B 0xFFFF_0000 64 Kbyte 64 Kbyte 64 kByte 64 kByte 64 Kbyte 64 Kbyte
32058KS–AVR32–01/12