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Samsung S3C2410A Microphone User Manual

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DMA S3C2410A

8-6

EXAMPLES

Single service in Demand Mode with Unit Transfer Size

The assertion of XnXDREQ is need for every unit transfer (Single service mode). The operation continues while the

XnXDREQ is asserted (Demand mode), and one pair of Read and Write (Single transfer size) is performed.

XSCLK

XnXDREQ

XnXDACK

Double synch

Read Write

~

~

~

~

Read Write

~

~

~

~

Figure 8-4. Single service in Demand Mode with Unit Transfer Size

Single service in Handshake Mode with Unit Transfer Size

XSCLK

XnXDREQ

XnXDACK

Double synch

Read Write

~

~

~

~

Read Write

~

~

~

~

2 cycles

Figure 8-5. Single service in Handshake Mode with Unit Transfer Size

Whole service in Handshake Mode with Unit Transfer Size

XSCLK

XnXDREQ

XnXDACK

Double synch

Read Write

~

~

~

~

3 cycles Read Write

~

~

~

~

Read Write

~

~

~

~

2 cycles 2 cycles

Figure 8-6. Whole service in Handshake Mode with Unit Transfer Size

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