HDLC Controller

Reference Design LogoHDLC is the abbreviation for High-Level Data Link Control published by the International Standards Organization (ISO). This data link protocol is located at the link layer (layer 2) of the 7-layer OSI reference model. Today, a variety of link layer protocols such as LAPB, LAPD, LLC and SDLC are all based on the HDLC protocol with a few modifications.

The netlist files for CPLDs include .BL1 files for ispMACH 4000ZE, 4000, and 5000VG. The netlist files for FPGAs include .NGO files.

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Block Diagram

Performance and Size

Family Device Channels Configured LUTs REGs SLICEs fmax (MHz)1 Revision
ECP2 LFE2-70E-5F672C 1 104 140 95 88 1.1
6 701 855 602 193 1.1
ECP2M LFE2M-70E-5F900C 1 104 140 95 292 1.1
6 701 855 602 158 1.1
XP2 LFXP2-17E-5F256C 1 104 140 95 292 1.1
6 701 855 602 163 1.1
MachXO LCMXO2280C5FT324C 1 105 140 76 227 1.1
6 698 855 477 149 1.1

1. The Max. Clock Frequency is obtained by running the Timing Analysis of Lattice design software. Please run the timing simulation after you merge it with your design.

Performance and Utilization for CPLDs

Tested Devices Performance I/O Pins Design Size Revision
Multiple Channels
LC51024VG-5F676 81.3 MHz 970/1024 Macrocells 3.1
Single Channel
LC4256B-3T176C 270.3 MHz 149/256 Macrocells 3.1
LC4256ZE-7MN144C 155.04 MHz   142/256 Macrocells 3.1

1. The Max. Clock Frequency is obtained by running the Timing Analysis of Lattice design software. Please run the timing simulation after you merge it with your design.

Note: The performance and design sizes shown above are estimates only. The actual results may vary depending upon the chosen parameters, timing constraints, and device implementation. See the design's documentation for details. All coding and design work was done on a PC platform unless noted otherwise.

Documentation

Technical Resources
TITLE NUMBER VERSION DATE FORMAT SIZE
HDLC Controller for FPGAs - Documentation
RD1038 01.1 9/4/2008 PDF 1.1 MB
HDLC Controller Implemented in ispMACH 4000ZE and CPLD Families - Source Code
RD1009 3.1 7/15/2009 ZIP 731.5 KB
HDLC Controller for FPGAs - Source Code
RD1038 1.0 9/4/2008 ZIP 1.2 MB
HDLC Controller Implemented in ispMACH 4000ZE and CPLD Families - Documentation
Also download the source code below
RD1009 03.1 7/1/2009 PDF 566 KB


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