Rev. 3.0, 03/01, page 220 of 390
14.4
Program Flow
Figure14-7 on page 171 illustrates the program flow of CS4218 or CS4271 in PIO mode.
Figure14-8 on page 172 illustrates the program flow of AC97 in DMA mode. The flows under the
other conditions including that of CS42xx in DMA mode and that of AC97 in PIO mode are
analogous to these flows.
X
B
U
S
FIFO-0
B
U
F
P
S
R
SDOUT
TX FIFO
FIFO-1
Figure 14.3 CS4218 or CS4271 TX Controller
S
P
R
FIFO-0
X
B
U
S
SDIN
RX FIFO
FIFO-1
B
U
F
Figure 14.4 CS4218 or CS4271 RX Controller
Summary of Contents for HD64465
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