EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 377

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

Chapter 2: Cyclone IV Reset Control and Power Down
Transceiver Reset Sequences
Figure 2–6. Sample Reset Sequence of Receiver Only Channel—Receiver CDR in Automatic Lock Mode
Notes to
(1) For t
(2) The busy signal is asserted and deasserted only during initial power up when offset cancellation occurs. In subsequent reset sequences, the
© December 2010 Altera Corporation
Output Status Signals
busy signal is asserted and deasserted only if there is a read or write operation to the ALTGX_RECONFIG megafunction.
LTD_Auto
Figure
Reset Signals
rx_analogreset
rx_digitalreset
rx_freqlocked
busy (2)
duration, refer to the
2–6:
As shown in
CDR automatic lock mode:
1. After power up, wait for the busy signal to be deasserted.
2. Keep the rx_digitalreset and rx_analogreset signals asserted during this
3. After the busy signal is deasserted, wait for another two parallel clock cycles, then
4. Wait for the rx_freqlocked signal to go high.
5. When rx_freqlocked goes high (marker 3), from that point onwards, wait for
time period.
deassert the rx_analogreset signal.
at least t
point, the receiver is ready to receive data.
Cyclone IV Device Datasheet
Two parallel clock cycles
1
LTD_Auto
Figure
, then de-assert the rx_digitalreset signal (marker 4). At this
2–6, perform the following reset procedure for the receiver in
2
chapter.
3
t
LTD_Auto
(1)
4
Cyclone IV Device Handbook, Volume 2
2–11