EP4CE6F17C8 Datasheet, PDF (21/42 Pages) Altera Corporation – Cyclone IV Device Datasheet

Chapter 1: Cyclone IV Device Datasheet
Switching Characteristics
Figure 1–2 shows the lock time parameters in manual mode.
1 LTD = lock-to-data. LTR = lock-to-reference.
Figure 1–2. Lock Time Parameters for Manual Mode
Reset Signals
2
rx _ analogreset
4
rx _ digitalreset
CDR Control Signals
rx _ locktorefclk
rx _ locktodata
t_{LTD_Manual (2)}
3
t_{LTR_LTD_Manual (1)}
3
Output Status Signals
busy
Two parallel clock cycles
1
Figure 1–3 shows the lock time parameters in automatic mode.
Figure 1–3. Lock Time Parameters for Automatic Mode
Reset Signals
2
rx _ analogreset
4
rx _ digitalreset
Two parallel clock cycles
Output Status Signals
1
busy
3
rx _ freqlocked
tLTD_Auto (1)
1–21
May 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 3