SAM7X128_14 Datasheet, PDF (133/662 Pages) ATMEL Corporation – ARM-based Flash MCU

21.5
Hardware and Software Constraints
 SAM-BA boot copies itself in the SRAM and uses a block of internal SRAM for variables and stacks. The
remaining available size for the user code is 122880 bytes for SAM7x512, 57344 bytes for SAM7X256 and 24576
bytes for SAM7X128.
 USB requirements:
 pull-up on DDP
 18.432 MHz Quartz
Table 21-4. User Area Addresses
Device
Start Address
SAM7X512
0x202000
SAM7X256
0x202000
SAM7X128
0x202000
End Address
0x220000
0x210000
0x208000
Size (bytes)
122880
57344
24576
Table 21-5.
Peripheral
DBGU
DBGU
Pins Driven during Boot Program Execution
Pin
DRXD
DTXD
PIO Line
PA27
PA28
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
133