at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 72

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

72
AT91SAM9G20 Preliminary
Figure 13-1. Boot Program Algorithm Flow Diagram
SPI Serialflash Boot
SPI Serialflash Boot
SPI Dataflash Boot
SPI Dataflash Boot
NandFlash Boot
No
No
No
No
No
No
No
SD Card Boot
EEPROMBoot
NPCS0
Device
NPCS0
NPCS1
NPCS1
Setup
Timeout < 25 ms
Timeout < 25 ms
Timeout < 25 ms
Timeout < 25 ms
Timeout < 50ms
Timeout < 50ms
Timeout 50ms.
OR
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Character(s) received
Serial flash NPCS0
Serial flash NPCS1
USB Enumeration
Dataflash NPCS0
Dataflash NPCS1
Download from
Download from
Download from
Download from
Download from
Download from
Download from
NandFlash
Successful
SDCARD
EEPROM
on DBGU
Run SAM-BA Boot
Run SAM-BA Boot
Run
Run
Run
Run
Run
Run
Run
TWI/EEPROM Boot
Serial Flash Boot NPCS0
Serial Flash Boot NPCS1
DataFlash Boot NPCS0
DataFlash Boot NPCS1
NandFlash Boot
SAM-BA Boot
SD Card Boot
6384B–ATARM–15-Dec-08