GTS CPRI PHY IP Design Example User Guide

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ID 814583
Date 9/29/2025
Public
Document Table of Contents
Document Table of Contents x
1. Quick Start Guide 2. Design Example Description 3. GTS CPRI PHY IP Design Example User Guide Archives 4. Document Revision History for GTS CPRI PHY IP Design Example User Guide
1. Quick Start Guide x
1.1. Hardware and Software Requirements 1.2. Generating the Design 1.3. Directory Structure 1.4. Simulating the Design Example Testbench
2. Design Example Description x
2.1. GTS CPRI PHY IP Design Example Features 2.2. Design Example Components 2.3. Simulation Design Example 2.4. Hardware Design Example 2.5. Interface Signals 2.6. Design Example Registers
2.2. Design Example Components x
2.2.1. Packet Client 2.2.2. Round Trip Counter 2.2.3. Sources and Probes 2.2.4. Avalon® Memory-Mapped Decoder 2.2.5. JTAG Host 2.2.6. IOPLL 2.2.7. System PLL 2.2.8. Reset Sequencer
1. Quick Start Guide
2. Design Example Description
3. GTS CPRI PHY IP Design Example User Guide Archives
4. Document Revision History for GTS CPRI PHY IP Design Example User Guide

2.2.4. Avalon® Memory-Mapped Decoder

The Avalon® memory-mapped decoder is an address decoder used to arbitrate multiple Avalon® memory-mapped interface agents to one Avalon® memory-mapped interface host. It is a scalable decoder that can support different number of agents, capable of partial or full address decoding.
Table 20.  Avalon Memory-Mapped Decoder Parameter
Parameter Name Default Value Description
SLAVE_NUM 3 Number of agent interfaces.
ADDR_WIDTH 32 Determines the width of master_addr and slave_addr.
DATA_WIDTH 32 Determines the width of master_writedata, master_readdata, slave_writedata, and slave_readdata.
BYTE_EN_WIDTH 4 Determines the width of master_byteenable and slave_byteenable.
PARTIAL_DECODING_EN 0
To enable partial decoding of address:
  • 0 – disabled (full decoding)
  • 1 – enabled
SLAVE_ADDR_SEL_LSB_INDEX 20 When partial decoding is enabled, specify the lower boundary of the agent address bit index to decode.
SLAVE_ADDR_SEL_MSB_INDEX 23 When partial decoding is enabled, specify the upper boundary of the agent address bit index to decode. Must be greater than or equal to SLAVE_ADDR_SEL_LSB_INDEX and must not exceed ADDR_WIDTH-1.
Table 21.  Avalon Memory-Mapped Decoder Ports
Port Name Width Direction Domain Description
clk 1 Input - Clock. Supply with i_reconfig_clk.
rst 1 Input clk Synchronous reset. Active high.
master_addr ADDR_WIDTH Input clk Avalon memory-mapped host address.
master_read 1 Input clk Avalon memory-mapped host read.
master_write 1 Input clk Avalon memory-mapped host write.
master_writedata DATA_WIDTH Input clk Avalon memory-mapped host write data.
master_byteenable BYTE_EN_WIDTH Input clk Avalon memory-mapped host byte enable.
master_readdata DATA_WIDTH Output clk Avalon memory-mapped host read data.
master_readdatavalid 1 Output clk Avalon memory-mapped host read data valid.
master_waitrequest 1 Output clk Avalon memory-mapped host wait request.
slave_addr ADDR_WIDTH Output clk Avalon memory-mapped agent address.
slave_writedata DATA_WIDTH Output clk Avalon memory-mapped agent write data.
slave_byteenable BYTE_EN_WIDTH Output clk Avalon memory-mapped agent byte enable.
slave_read SLAVE_NUM Output clk Avalon memory-mapped agent read.
slave_write SLAVE_NUM Output clk Avalon memory-mapped agent write.
slave_readdata SLAVE_NUM*DATA_WIDTH Input clk Avalon memory-mapped agent read data.
slave_readdatavalid SLAVE_NUM Input clk Avalon memory-mapped agent read data valid.
slave_waitrequest SLAVE_NUM Input clk Avalon memory-mapped agent wait request.
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