AT32UC3A3256S_1 Datasheet, PDF (31/961 Pages) ATMEL Corporation – AVR32 32-Bit Microcontroller

AT32UC3A3
6. Memories
6.1 Embedded Memories
• Internal High-Speed Flash
– 256KBytes (AT32UC3A3256/S)
– 128Kbytes (AT32UC3A3128/S)
– 64Kbytes (AT32UC3A364/S)
• 0 wait state access at up to 36MHz in worst case conditions
• 1 wait state access at up to 66MHz in <orst 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
• Sector lock capabilities, Bootloader protection, Security Bit
• 32 fuses, preserved during Chip Erase
• User page for data to be preserved during Chip Erase
• Internal High-Speed SRAM
– 64KBytes, Single-cycle access at full speed on CPU Local Bus and accessible through the
High Speed Bud (HSB) matrix
– 2x32KBytes, accessible independently through the High Speed Bud (HSB) matrix
6.2 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 AVR32UC CPU uses unsegmented translation, as described in the AVR32 Architec-
ture Manual.
The 32-bit physical address space is mapped as follows:
Table 6-1. AT32UC3A3 Physical Memory Map
Device
Start
Address
Size
AT32UC3A325
6
Embedded CPU SRAM
0x00000000 64KByte
Embedded Flash
0x80000000 256KByte
EBI SRAM CS0
0xC0000000 16MByte
EBI SRAM CS2
0xC8000000 16MByte
EBI SRAM CS3
0xCC000000 16MByte
EBI SRAM CS4
0xD8000000 16MByte
EBI SRAM CS5
0xDC000000 16MByte
EBI SRAM CS1 /SDRAM CS0 0xD0000000 128MByte
USB Data
0xE0000000 64KByte
Embedded System SRAM 0 0xFF000000 32KByte
Size
AT32UC3A312
8
64 KByte
128 KByte
16 MByte
16 MByte
16 MByte
16 MByte
16 MByte
128 MByte
64 KByte
32 KByte
Size
AT32UC3A36
4
64 KByte
64 KByte
16 MByte
16 MByte
16 MByte
16 MByte
16 MByte
128 MByte
64 KByte
32 KByte
31
32072A–AVR32–03/09