351
6.4.2
Block Diagram
Bus controller
Internal data bus
Interrupt request
signals to CPU for
individual channels
External pins
EDMDRn
EDACRn
EDTCRn
EDDARn
EDSARn
Processor
Address buffer
Data buffer
Legend
EDSARn: EXDMA source address register
EDDARn: EXDMA destination address register
EDTCRn: EXDMA transfer count register
EDMDRn: EXDMA mode control register
EDACRn: EXDMA address control register
EDREQn
: EXDMA transfer request
EDRAKn
:
EDREQn
acknowledge
ETENDn
: EXDMA transfer end
EDACKn
: EXDMA transfer acknowledge
n = 0 to 3
Control logic
Module data bus
EDREQn
EDRAKn
ETENDn
EDACKn
Figure 6.4 Block Diagram of EXDMAC
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