Preliminary
S3C2451X RISC MICROPROCESSOR
USB2.0 DEVICE
17-33
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
AHB MASTER(DMA) OPERATION FLOW CHART
A. OUT Transfer Operation Flow
Total Transfer Counter in USB core is Zero?
USB Core receives OUT data from HOST PC and transfers to Memory.
AHB Master IF Registers (Unit Counter, Total Transfer Counter,
Control) are set in initial state or Interrupt service routine.
AHB Master IF Registers are to be set after MCU reads all data packets
from USB OUT FIFO to operate a AHB Master operation after interrupt
service mode.
Master Interface transfers data from OUT FIFO in USB core to Memory
AHB Master Operation is ended and Interrupt mode is On.
Figure 17-3. OUT Transfer Operation Flow