OperationChapter 14 Automatic Transfer ControllerXIV - 311314-3-18 Transfer Mode DIn transfer mode D, ATC1 automatically transfers one byte of data from any memory space to any othermemory space every time an ATC1 activation request occurs.AT1MAP0AT1MAP0 + 1AT1MAP0 + 2AT1MAP0 + 3Memory Pointer 000000 - 3FFFFAT1MAP1AT1MAP1 + 1AT1MAP1 + 2AT1MAP1 + 3Memory Pointer 000000 - 3FFFF(1)(2) (2)Figure 14-3-15 Transfer Mode DSet the source address in 18-bit memory pointer 1 (AT1MAP1H, M, L), and set the destination addressin 18-bit memory pointer 0 (AT1MAP0H, M, L).In transfer mode D, the values in memory pointers 0 and 1 increment by 1 each time a byte-length datatransfer ends. As a result, the source and destination addresses for the next transfer are one addresshigher than those for the original transfer.Set the data transfer count for ATC1 in the transfer data counter (AT1TRC). The counter can be set toa maximum of 255 transfers. The counter decrements each time ATC1 is activated. When it reachesx'00', an interrupt (ATC1IRQ) occurs and the automatic transfer ends.
