SAM4L Datasheet, PDF (702/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
27.7.3 Clocks
The clock for the TWIM bus interface (CLK_TWIM) is generated by the Power Manager. It is rec-
ommended to disable the TWIM before disabling the clock, to avoid freezing the TWIM in an
undefined state.
27.7.4 DMA
The TWIM DMA handshake interface is connected to the Peripheral DMA Controller. Using the
TWIM DMA functionality requires the Peripheral DMA Controller to be programmed after setting
up the TWIM.
27.7.5 Interrupts
The TWIM interrupt request lines are connected to the NVIC. Using the TWIM interrupts requires
the NVIC to be programmed first.
27.7.6
Debug Operation
When an external debugger forces the CPU into debug mode, the TWIM continues normal oper-
ation. If the TWIM is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
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