Other Functions - Fujitsu FR60 Hardware Manual

CHAPTER 14 DMA CONTROLLER (DMAC)

14.2.5 Other Functions

The MB91301 series has the DACK, DEOP, and DREQ pins, which can be used for
external transfer. These pins can also be used as general-purpose ports.
■ Function of the DACK, DEOP, and DREQ Pins
To use the DACK, DEOP, or DREQ pins for external transfer, a switch must be made from the
port function to the DMA pin function.
To make the switch, set the PFR register.
404