Panasonic MN101L Series

Chapter 14
DMA Controller
XIV - 2 Overview
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.
Table:14.1.1 Function
Data transmission unit 8-bit or 16-bit
Maximum number of DMA transfer
2
10
-1
DMA start trigger
External interrupt (including Key interrupt), Internal interrupt and Soft-
ware trigger
Transfer mode Single transfer or Burst transfer
Emergency stop DMA transfer can be stopped during DMA data transfer by software.