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| 型號： | XCCACE-TQG144I |
| 廠商： | Xilinx Inc |
| 文件頁數(shù)： | 36/69頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ACE CONTROLLER CHIP TQ144 |
| 產(chǎn)品變化通告： | XCCACE-TQG144I Discontinuation 31/Oct/2011 |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 控制器類型： | ACE 控制器 |
| 電源電壓： | 3 V ~ 3.6 V |
| 電流 - 電源： | 30mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 144-LQFP |
| 供應(yīng)商設(shè)備封裝： | 144-TQFP（20x20） |
| 包裝： | 管件 |
| 其它名稱： | 122-1511-5 |
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System ACE CompactFlash Solution
DS080 (v3.0) April 7, 2014
41
Product Specification
R
— OBSOLETE — OBSOLETE — OBSOLETE — OBSOLETE —
Reading Sector Data from CompactFlash Control
Flow Process
Sector data can be read from the CompactFlash device via
the MPU interface of the System ACE CF controller by fol-
lowing the control flow sequence shown in Figure 22. The
first step in the sequence of accessing the CompactFlash
interface is to arbitrate for a lock. The control flow process
for obtaining a CompactFlash resource lock is shown in
Figure 23, page 43. Once the MPU interface has been
granted a CompactFlash lock, the MPU interface needs to
make sure that the CompactFlash device is ready to receive
a command. The process for polling the command readi-
ness indicator is shown in Figure 24, page 44.
Figure 22: Reading Sector Data from CompactFlash Control Flow Process
Set ReadMemCardData
Command Control
Set MPU LBA
Set Sector
Count Control
Initialize Buffer
Count variable*
Read Data Buffer
Release CF Lock
Data is read.
Return success.
Buffer Count
equal to 0?
Decrement Buffer
Count variable
No
Yes
*Set Buffer Count variable equal to
the number of buffers in a sector transfer
= ((Sector Count)*(512 Bytes per sector))/
(32 bytes per buffer)
= (Sector Count) * (16 buffers per sector)
Read Data from CF
Get CF Lock
Check If Ready
For Command
Write LBA bits 7:0 to byte address 10h
Write LBA bits 15:8 to byte address 11h
Write LBA bits 23:16 to byte address 12h
Write LBA bits 27:24 to byte address 13h
Write SECCNT bits 7:0 to byte address 14h
W rite CFGRESET bit = 1 to byte address 18h
W rite LOCKREQ
bit = 0 to byte
address 18h
Reset configuration
controller
Clear configuration
controller reset
W rite CFGRESET
bit = 0 to byte
address 18h
Write CMD bits to byte address 15h
DS080_48_051701
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