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参数资料
| 型号： | PT7A6526 |
| 英文描述： | 50V Fast Recovery Diode in a DO-203AB (DO-5) package |
| 中文描述： | 单通道协议控制器？ |用户手册PT7A6525（6）在中断演示模式？（PDF格式系统） |
| 文件页数： | 6/41页 |
| 文件大小： | 1640K |
| 代理商： | PT7A6526 |
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14
PT Pericom Technology Inc.
The Demo Board of PT7A6525
in DMA Mode
Connect to Demo Board
When the demo program starts to run or after a error
has happened on the connection between the demo pro-
gram on PC and the supervisor program on demo board,
the demo program cannot communicates with the demo
board correctly. To establish a connection is needed. It
can be completed by pressing the button “Connect to
Demo Board” in the Main Menu Window.
This window sends a command to the supervisor pro-
gram on the demo board and waits for the acknowledg-
ment of the supervisor program in a limited time span.
If the acknowledgment is received correctly, the con-
nection is established.
Before the connection has been established, all the func-
tion will be disabled. The user must return to the Main
Menu if in other windows at this time. If a communi-
cation error has happened in the other windows, a error
message box will be displayed.
After the button “Connect to Demo Board” is pressed,
a window will be shown as Figure 8. If the connection
is established correctly, the button “OK” is enabled as
shown in Figure 8 and the window will prompt the
user to return to Main Menu.
Figure 8. The Window of Connection (When cor-
rectly)
If the connection is still incorrect, the button “Connect
Again” and the button “Cancel” is enabled. Check the
RS232 cable, and make it sure that the power of the
demo board is on and the board has been reset, then
press “Connect Again”. If there is still error message
shown by the window, some damage on demo board,
RS232 connectors and cable, or PC may have happened.
Pressing “Cancel” can return to Main Menu.
Figure 9 shows an example of connection error. When
an error happens in the Write Register Window, this
error message box will be shown. Press the “OK” but-
ton to return to the Write Register Window.
Figure 9. An Example of Error Message Box
Initialize the Demo Board
The Initialization of the demo board is implemented
by writing registers in Write Register Window when
the check box “Initiate” is selected. This initialization
process writes the registers of PT7A6525 and 8237.
The contents of the registers is shown in Table 2 and
Figure 10.
The register contents of PT7A6525 can be changed by
user. The detail is shown in the following page.
8237 is initialized only by this process. The initializa-
tion of 8237 is in the background and invisible. An
initialization process is necessary before the functions
of the demo program can work normally.
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