DC & Switching Characteristics
Table 6–50. Stratix GX Transceiver Reset & PLL Lock Time Parameters
Symbol
tANALOGRESETPW (5)
tDIGITALRESETPW (5)
Min
1
Typ
Max
Units
mS
4
Parallel clock
cycle
tTX_PLL_LOCK (3)
10
5
µS
mS
µS
tRX_FREQLOCK (4)
tRX_FREQLOCK2PHASELOCK (2)
5
Notes to Table 6–50:
(1) The minimum pulse width specified is associated with the power-down of circuits.
(2) The clock recovery unit (CRU) phase locked-to-data time is based on a data rate of 500 Mbps and 8B/10B encoded
data.
(3) After #pll_areset, pll_enable, or PLL power-up, the time required for the transceiver PLL to lock to the
reference clock.
(4) After #rx_analogreset, the time for the CRU to switch to lock-to-data mode.
(5) There is no maximum pulse width specification. The GXB can be held in reset indefinitely.
Routing delays vary depending on the load on a specific routing line. The
Quartus II software reports the routing delay information when running
the timing analysis for a design. Contact Altera Applications Engineering
for more details.
External Timing Parameters
External timing parameters are specified by device density and speed
grade. Figure 6–5 shows the timing model for bidirectional IOE pin
timing. All registers are within the IOE.
Altera Corporation
August 2005
6–35
Stratix GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
