Altera Transceiver SI Manual do Utilizador descarregar pdf (Página 33)

Altera Corporation Getting Started User Guide A–5

June 2006 Transceiver Signal Integrity Development Kit, Stratix II GX Edition

Push Button Switches

Table A–3 lists the push button switch signal names, describes the

functionality, lists the board reference numbers, and FPGA pin

connection.

Table A–3. Push Button Switches

Push Button Switch Name Description

Board

Reference

Number

Connected

to FPGA

Number

resetn (system reset) Performs a reset on the transceiver and

also the entire design.

S1 AD28

generator_checker_reset_switch Performs a reset on the data generators

and error checkers. The push button will

also reset the error counters.

S2 AF34

change_PMA_switch Based on the selection of the PMA

Controls DIP switch, the push button sets

the value for either VOD, preemphasis,

DC gain or equalization.

Every time the push button is pressed, the

value is incremented. When the

maximum value is reached, the value

starts from zero.

S3 AF33

insert_error_switch Inserts one bit error in the transmit data. S4 AE30

clear_error_counter_switch The push button resets the error

counters.

S5 AE29

show error count Displays the most significant byte of the

error. For example if the error count is

02FF, when the push button is asserted

02 is displayed until the button is

de-asserted. Refer to Table A–1 on

page A–2 for additional information.

S6 AH20

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Altera Transceiver SI Manual do Utilizador Página 33