Overview - Panasonic MN101L Series User Manual

Chapter 14
DMA Controller

14.1 Overview

Direct memory access controller (DMA) allows the direct data access in all memory area without CPU.
DMA has priority to access data in memory area over CPU. For internal memory (ReRAM/RAM), CPU can
access memory during DMA data transfer if the bus collision between DMA and CPU doesn't happen.
DMA has the following features.
Data transmission unit
Maximum number of DMA transfer
DMA start trigger
Transfer mode
Emergency stop
XIV - 2 Overview
Table:14.1.1 Function
8-bit or 16-bit
10
2 -1
External interrupt (including Key interrupt), Internal interrupt and Soft-
ware trigger
Single transfer or Burst transfer
DMA transfer can be stopped during DMA data transfer by software.