NUMICRO-SDK Nuvoton Technology Corporation of America, NUMICRO-SDK Datasheet - Page 518

• Manufacturer Part Number: NUMICRO-SDK
• Description: KIT EVAUATION NUC100/120/130/140
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r
• Type: MCUr

Specifications of NUMICRO-SDK

• Contents: Board, Cable, CD, Nu-Link
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: NUC100, NUC120, NUC130, NUC140

NuMicro™ NUC100 Series Technical Reference Manual
5.18.4 Function Description
The PDMA controller has up to nine channels of DMA associated with Peripheral-to-Memory 、
Memory-to-Peripheral or Memory-to-Memory. For each PDMA channel, there is one word
memory as transfer buffer between the Peripherals APB IP and Memory.
The CPU can recognize the completion of a PDMA operation by software polling or when it
receives an internal PDMA interrupt. As to the source and destination address, the PDMA
controller has two modes: increased and fixed.
Every PDMA default channel behavior is not pre-defined, so users must configure the channel
service settings of PDMA_PDSSR0 and PDMA_PDSSR1 before start the related PDMA channel.
Software must enable DMA channel PDMA [PDMACEN] and then write a valid source address to
the PDMA_SARx register, a destination address to the PDMA_DSABx register, and a transfer
count to the PDMA_BCRx register. Next, trigger the DMA_CSRx PDMA [TRIG_EN]. PDMA will
continue the transfer until PDMA_CBCRx comes down to zero, If an error occurs during the
PDMA operation, the channel stops unless software clears the error condition and sets the
PDMA_CSRx [SW_RST] to reset the PDMA channel and set PDMA_CSRx [PDMACEN] and
[TRIG_EN] bits field to start again.
In PDMA (Peripheral-to-Memory or Memory-to-Peripheral) mode, DMA can transfer data between
the Peripherals APB IP (ex: UART, SPI, ADC….) and Memory.
Publication Release Date: Dec. 22, 2010
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Revision V1.06