Panasonic MN101C77C, F77G user manual Transfer mode a, Transfer Mode a

Chapter 14 Automatic Transfer Controller

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.

Memory Pointer 0 00000 - 3FFFF

AT1MAP0

AT1MAP0 + 1

AT1MAP0 + 2

AT1MAP0 + 3

Memory Pointer 1 00000 - 3FFFF

AT1MAP1

AT1MAP1 + 1

AT1MAP1 + 2

AT1MAP1 + 3

Figure 14-3-12 Transfer Mode A

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.

XIV - 28 Operation