参数资料
型号: IP-ASI
厂商: Altera
文件页数: 20/27页
文件大小: 0K
描述: IP VIDEO INTERFACE - ASI
标准包装: 1
系列: *
类型: MegaCore
功能: 数字视频广播用接收器/收发器
许可证: 初始许可证
Chapter 4: Functional Description
4–5
Testbench
Testbench
The testbench instantiates two ASI MegaCore functions—one ASI transmitter, one
ASI receiver.
To test a realistic ASI link, an ASI packet generator creates packets that are sent from
the instantiation of the ASI transmitter to the instantiation of the ASI receiver. A
random serial data delay generator is inserted on the way to mimic random jitter on
the link. The transmitter and receiver are clocked with asynchronous clock sources—
the frequencies differ by 200 ppm, which maximizes the stress that the ASI receiver
sees and is similar to a real link.
Signals
Table 4–1 shows the signals.
Table 4–1. Signals (Part 1 of 2)
Signal
asi_rx
cal_blk_clk
gxb_powerdown (1)
reconfig_clk (1) (2)
reconfig_togxb[3:0] (1) (2)
rst
rx_clk135
rx_protocol_in[9:0]
rx_protocol_in_valid
rx_serial_clk
rx_serial_clk90
tx_clk270
tx_clk135
tx_data[7:0]
tx_en
tx_refclk
tx_serdes_in[9:0]
asi_tx
reconfig_fromgxb[16:0] (1) (2)
rx_data[7:0]
rx_data_clk
rx_serdes_out[9:0]
rx_serdes_out_valid
Direction
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
Description
ASI input.
Calibration clock for hard transceiver.
Transceiver block reset and power down. This signal of all the
instances that are to be combined into a single transceiver block
must be connected to a single point; for example, the same input
pin or same logic.
Clock input for the embedded transceiver instance.
Data input for the embedded transceiver instance.
Reset.
135-MHz clock from external PLL.
Protocol input (for split SERDES/protocol).
Valid signal for rx_protocol_in .
337.5-MHz clock from external PLL.
337.5-MHz clock from external PLL with + 90 ? phase shift.
270-MHz clock from external PLL.
135-MHz clock from external PLL (only for hard SERDES).
TS parallel data input into encoder.
Transmit enable. Assert to indicate valid data on tx_data .
27-MHz reference clock for transmitter.
Direct input to transceiver block for split protocol/tranceiver mode.
ASI output.
Data output from the embedded transceiver instance.
Decoded parallel TS data out of receiver.
135-MHz parallel clock, which you can use to clock
rx_data[7:0] .
Raw data from transceiver block before decoding.
Valid signal out of the transceiver.
January 2014
Altera Corporation
Asynchronous Serial Interface (ASI) MegaCore Function User Guide
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