AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 308

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

25.10 Clock Switching Details
25.10.1
308
AT91SAM9G45
Master Clock Switching Timings
Table 25-1
selected clock to another one. This is in the event that the prescaler is de-activated. When the
prescaler is activated, an additional time of 64 clock cycles of the new selected clock has to be
added.
Table 25-1.
To
Main Clock
SLCK
PLLA Clock
Peripheral clock 4 is disabled.
write_register(PMC_PCDR,0x00000010)
From
gives the worst case timings required for the Master Clock to switch from one
Clock Switching Timings (Worst Case)
PLLACOUNT x SLCK +
0.5 x Main Clock +
0.5 x Main Clock +
2.5 x PLLAx Clock
Main Clock
4.5 x SLCK
4 x SLCK +
–
PLLACOUNT x SLCK
2.5 x PLLA Clock +
2.5 x Main Clock
4 x SLCK +
5 x SLCK +
SLCK
–
PLLACOUNT x SLCK
2.5 x PLLA Clock +
3 x PLLA Clock +
3 x PLLA Clock +
1 x Main Clock
6438F–ATARM–21-Jun-10
PLLA Clock
4 x SLCK +
4 x SLCK +
5 x SLCK