参数资料
型号: IP-POSPHY4
厂商: Altera
文件页数: 42/144页
文件大小: 0K
描述: IP POS-PHY L4
标准包装: 1
系列: *
类型: MegaCore
功能: POS-PHY 4 级接口,链路层/物理层
许可证: 初始许可证
4–2
Chapter 4: Functional Description—Receiver
Block Description
Block Description
Figure 4–1 on page 4–2 shows the blocks and clocks that comprise the receiver
MegaCore function.
Figure 4–1. Block Diagram—Receiver
rdint_clk
SPI4.2
Interface
rdclk
Data Recei v er
And
Serial-to-Parallel
Con v erter
DPA Channel
Aligner
Data
Processor
Atlantic
Buffer 0
Atlantic
Interface 0
Atlantic
Atlantic
Buffer N
Interface N
rsclk
Status PHY
Status FSM
Status
Register
Status Hold
rxsys_clk
Status
Calculator
ra v _clk
Note to Figure 4–1 :
(1) The dotted lines illustrate the clock domain separations.
This section describes the top-level blocks of the POS-PHY Level 4 receiver MegaCore
function.
Data Receiver and Serial-to-Parallel Converter (rx_data_phy_altlvds)
Data and control words arrive on the rdat bus, and are sampled on both edges of
rdclk . Payload and control words contain two bytes, where bit 15 is the most
significant bit (MSB) and bit 8 is the least significant bit (LSB) of the first byte, and bit
7 is the MSB and bit 0 is the LSB of the second byte.
For 128- and 64-bit variations, an ALTLVDS_RX megafunction deserializes the SPI-4.2
rdat / rctl lines into words at ???? or ???? the rdat data rate, respectively. The rdint_clk
is derived from the rdclk input pin, and is the clock that drives the internal logic
elements for the receiver.
For 32-bit (quarter-rate) variations, an ALTDDIO_IN megafunction deserializes the
SPI-4.2 rdat / rctl lines into words at ??? the rdat data rate.
For rates above 311 Mbps, the Stratix ? III, Stratix II, Stratix GX, and Stratix devices
include a dedicated SERDES (ALTLVDS megafunction) implemented in LVDS I/Os.
For rates below 250 Mbps, LVDS I/O pins are used.
1
A fast phase-locked loop (PLL) is required for the ALTLVDS SERDES.
POS-PHY Level 4 MegaCore Function User Guide
May 2013 Altera Corporation
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