SPI-42-SC-U4 Lattice

Soft SPI4 IP Core Users Guide September 2010 IPUG59_01.7Table of Contents Chapter 1. Introduction .......................................................................................................................... 4 Quick Facts ........................................................................................................................................................... 4 Features ................................................................................................................................................................ 4 Chapter 2. Functional Description ........................................................................................................ 6 Overview ............................................................................................................................................................... 6 Operational Description......................................................................................................................................... 6 SPI4 Transmitter - S4TX.............................................................................................................................. 7 SPI4 Transmit Data Protocol - S4TXDP ...................................................................................................... 7 SPI4 Transmit I/O - S4TXIO (TXGB) ........................................................................................................... 9 SPI4 Transmit Status - S4TXSP ................................................................................................................ 11 SPI4 Receiver - S4RX................................................................................................................................ 14 SPI4 Receive Data Protocol - S4RXDP..................................................................................................... 15 SPI4 Receive Status Protocol - S4RXSP................................................................................................... 18 SPI4 Receiver I/O - S4RXIO (RXGB) ........................................................................................................ 21 Calendar and Status RAM Access...................................................................................................................... 22 Start-Up Procedures ........................................................................................................................................... 23 Receive Direction Start-Up......................................................................................................................... 23 Dynamic Mode Start-up and Recovery (SMSR) FSM................................................................................ 23 Static Mode Start-up and Recovery (SMSR) FSM..................................................................................... 23 Transmit Direction Start-Up........................................................................................................................ 24 Signal Descriptions ............................................................................................................................................. 24 Chapter 3. Parameter Settings ............................................................................................................ 33 Global Tab........................................................................................................................................................... 36 User Data Interface.................................................................................................................................... 36 Generation Options.................................................................................................................................... 36 Transmit Tab ....................................................................................................................................................... 37 Transmit Data Path Options....................................................................................................................... 37 Transmit Line Side FIFO Thresholds ......................................................................................................... 37 Transmit User Side FIFO Thresholds ........................................................................................................ 37 Transmit Packing Enable ........................................................................................................................... 38 Receive Tab LatticeECP .................................................................................................................................. 38 Receive Data Path Options........................................................................................................................ 38 Receive Tab Lattice SC/SCM .......................................................................................................................... 39 Receive Data Path Options........................................................................................................................ 39 Status Tab........................................................................................................................................................... 40 Status Channel Options ............................................................................................................................. 40 Transmit Status Path Options .................................................................................................................... 40 Receive Status Path Options ..................................................................................................................... 40 Calendars Tab..................................................................................................................................................... 41 Transmit Calendar Options ........................................................................................................................ 41 Receive Calendar Options ......................................................................................................................... 41 Chapter 4. IP Core Generation............................................................................................................. 42 Licensing the IP Core.......................................................................................................................................... 42 Getting Started.................................................................................................................................................... 42 IPexpress-Created Files and Top Level Directory Structure............................................................................... 44 Instantiating the Core.......................................................................................................................................... 46 Running Functional Simulation ........................................................................................................................... 46 Synthesizing and Implementing the Core in a Top-Level Design ....................................................................... 47 Hardware Evaluation........................................................................................................................................... 48 2010 Lattice Semiconductor Corp. All Lattice trademarks, registered trademarks, patents, and disclaimers are as listed at www.latticesemi.com/legal. All other brand or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without notice. IPUG59_01.7, September 2010 2 Soft SPI4 IP Core Users Guide