Panasonic MN101C77C, F77G user manual Transfer Mode C

Chapter 14 Automatic Transfer Controller

14-3-17 Transfer Mode C

In transfer mode C, ATC1 automatically transfers one byte of data from any memory space to any other memory space every time an ATC1 activation request occurs.

Memory Pointer 0 00000 - 3FFFF

(2)	AT1MAP0
	AT1MAP0 + 1
	AT1MAP0 + 2
	AT1MAP0 + 3

(1)

Memory Pointer 0 00000 - 3FFFF

AT1MAP1	(2)
AT1MAP1 + 1
AT1MAP1 + 2
AT1MAP1 + 3

Figure 14-3-14 Transfer Mode C

Set the source address in 18-bit memory pointer 0 (AT1MAP0H, M, L), and set the destination address in 18-bit memory pointer 1 (AT1MAP1H, M, L).

In transfer mode C, the values in memory pointers 0 and 1 increment by 1 each time a byte-length data transfer ends. As a result, the source and destination addresses for the next transfer are one address higher than those for the original transfer.

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.

XIV - 30 Operation