ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 555

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

29.2.14
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
Write Protection Registers
Figure 29-12. Change PLLx Programming
Figure 29-13. Programmable Clock Output Programming
To prevent any single software error that may corrupt PMC behavior, certain address spaces
can be write protected by setting the WPEN bit in the
(PMC_WPMR).
Write PMC_SCDR
Write PMC_SCER
Write PMC_PCKx
Write CKGR_PLLxR
PCKx Output
PLLx Clock
Master Clock
PCKRDY
PLLx Clock
Slow Clock
MCKRDY
LOCKx
PLL Clock is selected
PCKx is enabled
Slow Clock
“PMC Write Protect Mode Register”
PCKx is disabled
SAM3X/A
SAM3X/A
555
555