Echelon FTXL Hardware - Manual (Page 7)

FTXL Hardware Guide vii
Table of Contents
Welcome.........................................................................................................iii
Audience ........................................................................................................iii
Related Documentation ................................................................................iii
Related Altera Product Documentation ................................................iv
Related devboards.de Product Documentation...................................... v
FTXL Hardware Overview ................................................................................ 1
Overview ......................................................................................................... 2
The FTXL Developer’s Kit ............................................................................. 3
The FTXL Development Process................................................................... 3
Hardware Design..................................................................................... 4
FPGA Design ........................................................................................... 5
Software Design....................................................................................... 5
FTXL Developer’s Kit Hardware....................................................................... 7
Overview of the FTXL Developer’s Kit Hardware ....................................... 8
The DBC2C20 Development Board .............................................................. 8
Buttons and LEDs ................................................................................... 9
Jumper Settings..................................................................................... 11
Connectors and Headers ....................................................................... 11
The FTXL Adapter Board............................................................................ 13
Jumper Settings..................................................................................... 13
Connectors and Headers ....................................................................... 13
The FTXL Transceiver Board...................................................................... 15
LEDs....................................................................................................... 16
Jumper Settings..................................................................................... 16
Connectors and Headers ....................................................................... 16
FTXL Transceiver Hardware Interface........................................................... 19
Overview of the Hardware Interface .......................................................... 20
DC-DC Converter .................................................................................. 20
Control Signal Buffer ............................................................................ 20
Data Bus Isolation................................................................................. 20
Pull-Up Resistors for Communications Lines...................................... 21
The Parallel Communications Interface..................................................... 21
Token Passing and Handshaking......................................................... 23
Transferring Data.................................................................................. 23
FTXL Transceiver Pin Characteristics....................................................... 24
I/O Pins...................................................................................................24
IRQ Pin................................................................................................... 24
Reset Pin ................................................................................................25
Reset Function ................................................................................ 25
Power-Up Sequence ........................................................................ 26
Software Controlled Reset.............................................................. 27
Watchdog Timer .............................................................................. 27
LVI Considerations ......................................................................... 27
Reset Processes and Timing ........................................................... 27
Service Pin ............................................................................................. 27
Clock Pins............................................................................................... 27
FPGA Pin Assignments for the FTXL Transceiver ................................... 28
Control Flow: Host Receiving Data from the FTXL Transceiver.............. 29
Control Flow: Host Sending Data to the FTXL Transceiver..................... 32