AT91SAM7S128 ATMEL [ATMEL Corporation], AT91SAM7S128 Datasheet - Page 18

• Manufacturer Part Number: AT91SAM7S128
• Manufacturer: ATMEL [ATMEL Corporation]

9.4
9.5
9.5.1
9.5.2
9.5.3
18
AT91SAM7S321/32
Memory Mapping
AT91SAM7S Series Summary
Internal SRAM
Internal ROM
Internal Flash
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The AT91SAM7S256/128/64/321/32 embeds a high-speed 64/32/16/8/8-Kbyte SRAM bank.
After reset and until the Remap Command is performed, the SRAM is only accessible at address
0x0020 0000. After Remap, the SRAM also becomes available at address 0x0.
The AT91SAM7S Series embeds an Internal ROM. The ROM contains the FFPI and the
SAM-BA program.
The internal ROM is not mapped by default.
The AT91SAM7S256/128/64/321/32 features one bank of 256/128/64/32/32 Kbytes of Flash. At
any time, the Flash is mapped to address 0x0010 0000. It is also accessible at address 0x0 after
the reset and before the Remap Command.
Figure 9-1.
32 Kbytes of Flash Memory single plane
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8 Kbytes of Fast SRAM
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256 pages of 128 bytes
Fast access time, 30 MHz single-cycle access in Worst Case conditions
Page programming time: 6 ms, including page auto-erase
Page programming without auto-erase: 3 ms
Full chip erase time: 15 ms
10,000 write cycles, 10-year data retention capability
8 lock bits, protecting 8 sectors of 32 pages
Protection Mode to secure contents of the Flash
Single-cycle access at full speed
256M Bytes
Internal Memory Mapping
0x0000 0000
0x0010 0000
0x0020 0000
0x000F FFFF
0x001F FFFF
0x002F FFFF
0x0030 0000
0x0FFF FFFF
Flash Before Remap
Undefined Areas
SRAM After Remap
Internal Flash
Internal SRAM
(Abort)
253 M Bytes
1 M Bytes
1 M Bytes
1 M Bytes
6175BS–ATARM–04-Nov-05