Altera Stratix GX Transceiver - Manual (Page 256)

9–30 Altera Corporation
Stratix GX Transceiver User Guide January 2005
Recommended Resets
begin
state <= STROBE_TXPLL_LOCKED;
txdigitalreset <= 1'b1;
pll_areset <= 1'b0;
end
STABLE_TX_PLL: if (sync_reset) //Synchronous Reset can
be asserted in IDLE state (After reset seq has finished)
begin
txdigitalreset <= 1'b1;
pll_areset <= 1'b1;
state <=
STROBE_TXPLL_LOCKED;
end
else
state <= IDLE;
default: state = IDLE;
endcase
end
//Receive Reset Sequence
always @(posedge rx_cruclk or posedge pll_areset)
if(pll_areset)
begin
rxanalogreset <= 1'b1;
rxdigitalreset_rx_cruclk <= 1'b1;
waitstate_timer <=
WAITSTATE_TIMER_VALUE;
end
else
begin
if(sync_reset)
begin
rxanalogreset <= 1'b1;
rxdigitalreset_rx_cruclk<= 1'b1;
waitstate_timer <=
WAITSTATE_TIMER_VALUE;
end
else
begin
rxanalogreset <= 1'b0;
if (rx_freqlocked)
begin
if(waitstate_timer == 0)
begin
waitstate_timer
<= waitstate_timer;
if(receive_digitalreset)
rxdigitalreset_rx_cruclk <= 1'b1;
else
rxdigitalreset_rx_cruclk <= 1'b0;
end
else
begin
waitstate_timer
<= waitstate_timer - 1'b1;