at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 136

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

Each output signal can be enabled and disabled by writing 1 in the corresponding bit
PCK0 to PCK3 of PMC_SCER and PMC_SCDR, respectively. Status of the active pro-
grammable output clocks are given in the bits PCK0 to PCK3 of PMC_SCSR (System
Clock Status Register).
Moreover, like the MCK, a status bit in PMC_SR indicates that the Programmable Clock
is actually what has been programmed in the Programmable Clock registers.
As the Programmable Clock Controller does not manage with glitch prevention when
switching clocks, it is strongly recommended to disable the Programmable Clock before
any configuration change and to re-enable it after the change is actually performed.
Note also that it is required to assign the pin to the Programmable Clock operation in the
PIO Controller to enable the signal to be driven on the pin.
AT91RM3400
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