Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105 Data Sheet
Product codes
ATEVK1105
399
AT32UC3A
27.6.8.2
Switching from (to) Slow Clock Mode to (from) Normal Mode
When switching from slow clock mode to the normal mode, the current slow clock mode transfer
is completed at high clock rate, with the set of slow clock mode parameters.See
. The external device may not be fast enough to support such timings.
illustrates the recommended procedure to properly switch from one mode to the
other.
Figure 27-33.
Clock Rate Transition Occurs while the SMC is Performing a Write Operation
CLK_SMC
A[25:2]
NBS0, NBS1,
A0, A1
NCS
NWE
Slow Clock Mode
Internal signal from PM
This write cycle finishes with the slow clock mode set
Of parameters after the clock rate transition
NWE_CYCLE = 3
SLOW CLOCK MODE WRITE SLOW CLOCK MODE WRITE
1
1
1
1
1
1
2
3
2
NWE_CYCLE = 7
NORMAL MODE WRITE
Slow clock mode transition is detected:
Reload Configuration Wait State
32058K
AVR32-01/12