Datasheet

134
6120F–ATARM–03-Oct-06
AT91SAM7X512/256/128 Preliminary
21.4 SAM-BA Boot
The SAM-BA boot principle is to:
– Check if USB Device enumeration has occurred
– Check if the AutoBaudrate sequence has succeeded (see Figure 21-2)
Figure 21-2. AutoBaudrate Flow Diagram
Device
Setup
Character '0x80'
received ?
No
Ye s
Character '0x80'
received ?
No
Ye s
Character '#'
received ?
Ye s
Run SAM-BA Boot
Send Character '>'
No
1st measurement
2nd measurement
Test Communication
UART operational