Chapter 15 Dma Functions (Dma Controller); Features - NEC V850E/RS1 User Manual

V850E/RS1 includes a direct memory access (DMA) controller (DMAC) that executes and controls
DMA transfers. It supports transfers of data between internal or external memory and peripheral I/O,
between internal and external memory, or between peripheral I/Os. DMA requests can be issued by the
on-chip peripheral I/O (like serial interface, real-time pulse unit, or A/D converter), by interrupts from
external input pins, or they can be triggered by software.

15.1 Features

• 6 independent DMA channels
• Transfer unit: 8/16/32 bits
• Maximum transfer count: 65,536 (2
• Transfer type: Two-cycle transfer
• Transfer mode:
• Transfer requests
• Transfer objects
Note: This is only for µPD70F3403 and µPD70F3403A
Downloaded from Elcodis.com electronic components distributor

Chapter 15 DMA Functions (DMA Controller)

- Single transfer mode
- Block transfer mode
- Fixed channel transfer mode
- Request by interrupts from on-chip peripheral I/O or interrupts from external input pin
- Requests by software trigger
- Internal RAM ↔ peripheral I/O
- Peripheral I/O ↔ peripheral I/O
- Internal RAM ↔ external memory
- External memory ↔ external memory
User's Manual U16702EE3V2UD00
16
)
Note
Note
503