SAM7S161_14 Datasheet, PDF (150/775 Pages) ATMEL Corporation – ARM-based Flash MCU

21.6
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 sizes for the user codes are as follows: 57344 bytes for SAM7S512, 57344 bytes for
SAM7S256, 24576 bytes for SAM7S128, 8192 bytes for SAM7S64, 2048 bytes for SAM7S321 and SAM7S32,
3840 bytes for SAM7S161 and SAM7S16.
• USB requirements: (Does not pertain to SAM7S32/16)
– 18.432 MHz Quartz
– PIOA16 dedicated to the USB Pull-up
Table 21-4.
Device
SAM7S512
SAM7S256
SAM7S128
SAM7S64
SAM7S321
SAM7S32
SAM7S161
SAM7S16
User Area Addresses
Start Address
0x202000
0x202000
0x202000
0x202000
0x202000
0x201400
0x200000
0x200000
End Address
0x210000
0x210000
0x208000
0x204000
0x210000
0x201C00
0200F00
0200F00
Size (bytes)
57344
57344
24576
8192
2048
2048
3840
3840
Table 21-5.
Peripheral
DBGU
DBGU
Pins Driven during Boot Program Execution
Pin
DRXD
DTXD
PIO Line
PA9
PA10
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
150