at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 79

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 13-2. Clocks and DBGU Configurations
6221G–ATARM–31-Jan-08
"ROMBoot>" displayed on DBGU
Scan Large Crystal Table
NANDFlash Boot ?
(Table 15.3 &15.4)
UDPCK = PLLB/2
DataFlash Boot ?
MCK = PLLB/2
No
No
Yes
Internal RC Oscillator?
DBGU not configured
UDPCK = PLLB/2
(OSCSEL = 0)
MCK = Mosc
Start
End
End
No
(USB)
Yes
DBGU not configured
Scan Reduced Table
NANDFlash Boot ?
(Table 15.1 &15.2)
UDPCK = PLLB/2
DataFlash Boot ?
Autobaudrate ?
MCK = Mosc
No
Yes (DBGU)
AT91SAM9260
Yes
DBGU configured
UDPCK = xxxx
MCK = PLLB
End
End
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