µPD703100A-33, 703100A-40, 703101A-33, 703102A-33
7. DMA FUNCTIONS (DMA CONTROLLER)
{ 4 independent DMA channels
{ Transfer units: 8 or 16 bits
{ Maximum transfer count: 65536 (216)
{ Two types of transfer
•
•
Flyby (one-cycle) transfer
Two-cycle transfer
{ Three transfer modes
•
•
•
Single transfer mode
Single-step transfer mode
Block transfer mode
{ Transfer requests
•
•
•
DMARQ0 to DMARQ3 pin (× 4)
Requests from on-chip peripheral I/O (serial interface and real-time pulse unit)
Requests by software
{ Transfer objects
•
•
Memory to I/O and vice versa
Memory to memory and vice versa
{ DMA transfer end output signal (TC0 to TC3)
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Preliminary Data Sheet U14168EJ2V0DS00
NEC [ NEC ]
