Rev. 3.0, 03/01, page 223 of 390
1.SDOUT=0
NO
1.Software Reset
2.Pre write data to
fill TX FIFO
3.write TXEN=1
(refer to HW step
2)
3.Enable TX FIFO
control
2.TXEN=1
5. One block
FIFO empty
6. INTERRUPT
(refer to SW step 4)
4.Interrupt
5.Software read
status and TDI=1
6.Write data to fill the
empty block of TX FIFO
and clear interrupt(refer
to HW step 4)
SW
HW
4.Transmitting Data in
FIFO
N
Total Data has
been written
Interrupt
Read status register if
TFS=00, Set TXEN=0
and clear interrupt and
end
Figure 14.7 TX Flow in PIO Mode for CS4218 or CS4271
Summary of Contents for HD64465
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