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Chapter 14 Automatic Transfer Controller
Operation
XIV - 28
14-3-15 Transfer mode A
In transfer mode A, ATC1 automatically transfers one byte of data from any memory space to any other
memory space every time an ATC1 activation request occurs.
AT1MAP0
AT1MAP0 + 1
AT1MAP0 + 2
AT1MAP0 + 3
Memory Pointer 0
00000 - 3FFFF
AT1MAP1
AT1MAP1 + 1
AT1MAP1 + 2
AT1MAP1 + 3
Memory Pointer 1
00000 - 3FFFF
Set the source address in 18-bit memory pointer 0 (AT1MAP0H, M, L), and set the destination address
in 18-bit memory pointer 1 (AT1MAP0H, M, L).
Transfer mode A does not have an incrementing function for the memory pointers. The data transfer
executes for a fixed address.
Set the data transfer count for ATC1 in the transfer data counter (AT1TRC). The counter can be set to a
maximum of 255 transfers. The counter decrements each time ATC1 is activated. When it reaches x'00',
an interrupt (ATC1IRQ) occurs and the automatic transfer ends.
Figure 14-3-12 Transfer Mode A