32
32099DS–06/2010
AT32UC3L016/32/64
5.
Memories
5.1
Embedded Memories
•
Internal High-Speed Flash
– 64Kbytes (AT32UC3L064)
– 32Kbytes (AT32UC3L032)
– 16Kbytes (AT32UC3L016)
• 0 Wait State Access at up to 25MHz in Worst Case Conditions
• 1 Wait State Access at up to 50MHz 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 8% compared to 0 wait state operation
• 100 000 Write Cycles, 15-year Data Retention Capability
• 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
– 16Kbytes (AT32UC3L064, AT32UC3L032)
– 8Kbytes (AT32UC3L016)
5.2
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 5-1.
AT32UC3L Physical Memory Map
Device
Start Address
Size
AT32UC3L064
AT32UC3L032
AT32UC3L016
Embedded SRAM
0x00000000
16Kbytes
16Kbytes
8Kbytes
Embedded Flash
0x80000000
64Kbytes
32Kbytes
16Kbytes
HSB-PB Bridge B
0xFFFE0000
64Kbytes
64Kbytes
64Kbytes
HSB-PB Bridge A
0xFFFF0000
64Kbytes
64Kbytes
64Kbytes
Table 5-2.
Flash Memory Parameters
Part Number
Flash Size (FLASH_PW)
Number of pages
(FLASH_P)
Page size
(FLASH_W)
AT32UC3L064
64Kbytes
256
256 bytes
AT32UC3L032
32Kbytes
128
256 bytes
AT32UC3L016
16Kbytes
64
256 bytes