DK-DEV-5SGXEA7/ES Altera, DK-DEV-5SGXEA7/ES Datasheet - Page 378

• Manufacturer Part Number: DK-DEV-5SGXEA7/ES
• Description: KIT DEV STRATIX V FPGA 5SGXEA7
• Manufacturer: Altera
• Series: Stratix® Vr
• Type: FPGAr

Specifications of DK-DEV-5SGXEA7/ES

• Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Stratix® V 5SGXEA7
• Other names: 544-2725

1–6
Figure 1–7. CDR PLL in Stratix V Devices
Stratix V Device Handbook Volume 3: Transceivers
rx_serial_data
signal detect
Clock Data Recovery Unit
refclk
Channel PLL
The transmitter PMA includes the following features:
■
■
■
■
■
■
■
The PMA of each receiver channel includes a channel PLL that you can configure as a
CMU PLL or receiver CDR that generates the serial transceiver clocks.
Figure 1–7
Each receiver channel has a channel PLL that you can configure as an independent
CDR unit to recover the clock from the incoming serial data stream. The serial and
parallel recovered clocks are used to clock the receiver PMA and PCS blocks.
The CDR supports the full range of data rates. The voltage-controlled oscillator (VCO)
operates at half rate. The L-counter dividers after the VCO extend the CDR’s data rate
range. The settings are automatically chosen by the Quartus II software.
The CDR operates in either lock-to-reference (LTR) or lock-to-data (LTD) mode. In
LTR mode, the CDR tracks the input reference clock. In LTD mode, the CDR tracks the
incoming serial data.
“Transmitter Output Buffer” on page 1–15
“Programmable Transmitter Termination” on page 1–15
“Programmable Output Differential Voltage” on page 1–16
“Programmable Pre-Emphasis” on page 1–16
“Serializer” on page 1–16
“PCIe Receiver Detect” on page 1–17
“PCIe Electrical Idle” on page 1–17
/N
shows a CDR PLL.
Frequency
Controller
LTR/LTD
Detector
Detector
Phase
Phase
(PFD)
(PD)
Up
Up
Down
Down
Charge Pump
Loop Filter
&
Chapter 1: Transceiver Architecture in Stratix V Devices
Controlled
Oscillator
Voltage
Detect
(VCO)
Lock
/M
/2
/L
May 2011 Altera Corporation
pma_rx_is_lockedtoref
Serial Clock
Recovered Clock
PMA Architecture