Altera Stratix GX Transceiver - Manual (Page 231)

Altera Corporation 9–5
January 2005 Stratix GX Transceiver User Guide
Reset Control & Power Down
Figure 9–3 shows a situation in which you must reset both the transmitter
and receiver channels.
Figure 9–3. Receiver & Transmitter Reset Sequence
pll_areset = high
rxanalogreset = high
txdigitalreset = high
rxdigitalreset = high
pll_areset = low
rxanalogreset = high
txdigitalreset = high
rxdigitalreset = high
pll_locked
= high?
waitstate_timer
= 0?
pll_areset = low
rxanalogreset = low
txdigitalreset = low
rxdigitalreset = high
rx_freqlocked =
high?
pll_areset = low
rxanalogreset = low
txdigitalreset = low
rxdigitalreset = low
NO
YES
NO YES
Start
pll_areset = low
rxanalogreset = low
txdigitalreset = low
rxdigitalreset = high
wait_state
NO
YES
transmit_digitalreset receive_digitalreset
= high = high
NO
txdigitalreset
= high
rxdigitalreset
= high
YES YES
async_reset or sync_reset