xccace-tq144 Xilinx Corp., xccace-tq144 Datasheet - Page 46

• Manufacturer Part Number: xccace-tq144
• Description: Ic Ace Controller Chip Tq144
• Manufacturer: Xilinx Corp.

System ACE CompactFlash Solution
Wait for Buffer Ready Control Flow Process
The readiness of the System ACE data buffer indicates that
the buffer is either full during a ReadMemCardData com-
mand execution or empty during a WriteMemCardData
command execution. The control flow process for waiting for
46
Decrement timer
variable
Figure 26: Wait for Buffer Ready Control Flow Process
No
Initialize timer variable
Wait for Buffer Ready
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Timer Expired?
Buffer Ready?
ready. Return
Ready Status
timeout error.
Get Buffer
Buffer not
No
the buffer to become ready is shown in
buffer ready status can be obtained from either the
DATABUFRDY bit (bit 5) of the STATUSREG register (MPU
byte address 04h) or from the MPBRDY pin of the System
ACE CF controller.
Yes
from byte address 04h
Read DATABUFRDY bit
Yes
Return success.
Buffer is ready.
DS080_52_051701
DS080 (v2.0) October 1, 2008
Product Specification
Figure
26. The
R