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2
PT Pericom Technology Inc.
The Demo Board of PT7A6525
in DMA Mode
Table of Contents
Content
Page
Brief ......................................................................................................................................... 1
Introduction .............................................................................................................................. 4
Function Description ................................................................................................................. 4
CPU of the Demo Board ............................................................................................... 5
ROM ............................................................................................................................ 5
RS232 Serial Interface .................................................................................................. 5
RAM ............................................................................................................................ 5
Clock ........................................................................................................................... 6
PT7A6525 (or PT7A6526) ........................................................................................... 6
DMA Controller ........................................................................................................... 6
EPLD ........................................................................................................................... 7
Power ........................................................................................................................... 7
Jumpers ........................................................................................................................ 7
The Principle of PT7A6525 DMA Interface .............................................................................. 7
The DMA Transferring Process of PT7A6525 ............................................................... 7
The Programming of DMA Controller and PT7A6525 .................................................. 9
Initialization ................................................................................................................. 9
The Process of Transmission/Reception ....................................................................... 10
The Hardware Configuration of the Demo Board ...................................................................... 12
Component on the demo board .................................................................................... 12
Connect the Hardware .................................................................................................. 12
The User Manual of the Demo Program ................................................................................... 13
Install and Run the Demo Program .............................................................................. 13
Enter the Main Menu Window ..................................................................................... 13
Connect to Demo Board .............................................................................................. 14
Initialize the Demo Board ............................................................................................ 14
Write PT7A6525 Registers .......................................................................................... 15
Read PT7A6525 Registers ........................................................................................... 16
Write the Output Buffer and Transmit a Frame ............................................................ 17
Read the Data in Input Buffer ...................................................................................... 18
Auto Demo Flow ......................................................................................................... 19
Appendix A. The Circuit Schematic of Demo Board ................................................................. 20
Appendix B. The Logic Schematic of EPLD ............................................................................. 24
Appendix C. The Source File of 89C51 Assemble Supervision Program on Demo Borad...........28