SAM7S256_14 Datasheet, PDF (145/775 Pages) ATMEL Corporation – ARM-based Flash MCU

21.5 SAM-BA Boot
The SAM-BA boot principle is to:
– Check if USB Device enumeration has occurred
– Check if the Auto Baudrate sequence has succeeded (see Figure 21-3)
Figure 21-3. Auto Baudrate Flow Diagram
Device
Setup
Character '0x80'
No
received ?
Yes
Character '0x80'
No
received ?
Yes
Character '#'
No
received ?
Yes
Send Character '>'
Run SAM-BA Boot
1st measurement
2nd measurement
Test Communication
UART operational
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
145