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参数资料
| 型号： | PT7A6527 |
| 英文描述： | 60V Single N-Channel Hi-Rel MOSFET in a TO-204AE package |
| 中文描述： | 四通道协议控制器？ |演示板原理图和计划？（PDF格式） |
| 文件页数： | 2/41页 |
| 文件大小： | 1640K |
| 代理商： | PT7A6527 |
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10
PT Pericom Technology Inc.
The Demo Board of PT7A6525
in DMA Mode
The Process of Transmission/Reception
The operations of transferring or receiving a frame is
shown in the User Manual of the Demo Program. Here
shows the process of the transmission/reception in the
demo board. Some parts of the process are invisible to
user but by the Demo Program in back
Re-initialize
Base Address Register of
8237
Clear Byte Pointer Flip/
Flop of 8237
Write Count-1 to
Base Word Count
Register of 8237
Write XBCH of
PT7A6525
(Bit 7 must be set
as "1")
Write XBCL of
PT7A6525
(Because the length<127,
XBCL=Count-1)
Send XTF Command
(Write 10h to CMDR
register of PT7A6525)
ground. All the steps in the process are via CPU and
the flowcharts are shown on the CPU interface.
Figure 5 shows the process of the transmission of a
frame in Demo Program.
The DMA transfer from system memory to PT7A6525
shown as Figure 3 will perform after this process.
Figure 5. The Process of Transmission of a Frame
The definition of the high 4 bit of XBCH can be
found in PT7A6525 datasheet and be changed
by user in Demo Program.
Note:
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