Cypress Semiconductor FX2LP Informations techniques Page 7

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(Table of Contents)
9.2.4 FIFO Flag Pins (FLAGA, FLAGB, FLAGC, FLAGD)........................................................9-6
9.2.5 Control Pins (SLOE, SLRD, SLWR, PKTEND, FIFOADR[1:0]).......................................9-8
9.2.6 Slave FIFO Chip Select (SLCS) ....................................................................................9-10
9.2.7 Implementing Synchronous Slave FIFO Writes.............................................................9-10
9.2.8 Implementing Synchronous Slave FIFO Reads.............................................................9-13
9.2.9 Implementing Asynchronous Slave FIFO Writes...........................................................9-15
9.2.10 Implementing Asynchronous Slave FIFO Reads.........................................................9-17
9.3 Firmware .....................................................................................................................................9-19
9.3.1 Firmware FIFO Access..................................................................................................9-19
9.3.2 EPx Memories ...............................................................................................................9-20
9.3.3 Slave FIFO Programmable-Level Flag (PF) ..................................................................9-21
9.3.4 Auto-In / Auto-Out Modes..............................................................................................9-22
9.3.5 CPU Access to OUT Packets, AUTOOUT = 1...............................................................9-23
9.3.6 CPU Access to OUT Packets, AUTOOUT = 0...............................................................9-24
9.3.7 CPU Access to IN Packets, AUTOIN = 1.......................................................................9-27
9.3.8 Access to IN Packets, AUTOIN=0.................................................................................9-30
9.3.9 Auto-In / Auto-Out Initialization......................................................................................9-31
9.3.10 Auto-Mode Example: Synchronous FIFO IN Data Transfers.......................................9-32
9.3.11 Auto-Mode Example: Asynchronous FIFO IN Data Transfers .....................................9-33
9.4 Switching Between Manual-Out and Auto-Out...........................................................................9-33
Chapter 10. General Programmable Interface (GPIF)
10.1 Introduction................................................................................................................................10-1
10.1.1 Typical GPIF Interface.................................................................................................10-3
10.2 Hardware...................................................................................................................................10-5
10.2.1 The External GPIF Interface........................................................................................10-5
10.2.2 Default GPIF Pins Configuration..................................................................................10-6
10.2.3 Six Control OUT Signals..............................................................................................10-7
10.2.3.1 Control Output Modes ......................................................................................10-7
10.2.4 Six Ready IN signals....................................................................................................10-7
10.2.5 Nine GPIF Address OUT signals.................................................................................10-7
10.2.6 Three GSTATE OUT signals .......................................................................................10-8
10.2.7 8/16-Bit Data Path, WORDWIDE = 1 (default) and WORDWIDE = 0 .........................10-8
10.2.8 Byte Order for 16-bit GPIF Transactions.....................................................................10-8
10.2.9 Interface Clock (IFCLK) ...............................................................................................10-8
10.2.10 Connecting GPIF Signal Pins to Hardware..............................................................10-10
10.2.11 Example GPIF Hardware Interconnect....................................................................10-10
10.3 Programming the GPIF Waveforms ........................................................................................10-11
10.3.1 The GPIF Registers...................................................................................................10-12
10.3.2 Programming GPIF Waveforms.................................................................................10-12
10.3.2.1 The GPIF IDLE State .....................................................................................10-12
10.3.2.1.1 GPIF Data Bus During IDLE.............................................................10-13
10.3.2.1.2 CTL Outputs During IDLE..................................................................10-13
10.3.2.2 Defining States...............................................................................................10-14
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