Overview Of Dtp/External Interrupt Unit - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 18 DTP/EXTERNAL INTERRUPT UNIT

18.1 Overview of DTP/External Interrupt Unit

The DTP (Data Transfer Peripheral) unit is a peripheral control section located between
the peripheral units outside the device and the F
DMA request or interrupt requests from the external peripheral device, and report such
2
MC-16LX CPU to start µ µ µ µ DMA or interrupt handling.
requests to the F
I Overview of DTP/external interrupt unit
For µDMA, the request level can be selected from two types, "H" and "L". External interrupt
requests can be selected from four types: rising and falling edges and "H" and "L" signals.
I Block diagram of DTP/external interrupt unit
Figure 18.1-1 "Block diagram of DTP/external interrupt unit" shows a block diagram of the DTP/
external interrupt.
2
F MC-16 bus
4
4
4
8
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Figure 18.1-1 Block diagram of DTP/external interrupt unit
Interrupt/DTP enable register
Gate
Source F/F
Interrupt/DTP source register
Request level setting register
2
MC-16LX CPU. It is used to receive
4
Edge detection circuit Request input