Advantech PCM-3780 D.5 Mode D Waveforms

PCM-3780 User Manual 50

D.5 Mode D Waveforms

Rate Generator with No Hardware Gating

Mode D is typically used in frequency generation applications. In this

mode, the gate input does not affect counter operation. Once armed, the

counter will count to TC repetitively. On each TC the counter will reload

itself from the Load register; hence the Load register value determines the

time between TCs. A square wave rate generator may be obtained by

specifying the TC Toggled output mode in the Counter Mode register.

SOURCE

COUNT

VALUE

TC OUTPUT

TC TOGGLED

OUTPUT

LL-1 L-2 22 1 0 L-1 L-2

Mode D Waveforms

1 0 L 2 1 0

Contents

Main Page Page Page Page Page Contents Chapter 1 Introduction..................................................... 2 Chapter 2 Hardware Installation................................... 12 Chapter 3 Pin Assignments & Jumper Settings........... 18 Appendix A Specifications................................................. 26 Appendix D Waveform of Each Mode.............................. 44 Introduction Chapter 1 Introduction 1.1 Features Counter Modes (N: No gate control, L: Level gate control, E: Edge gate control) Table 1.1: PCM-3780 Counter Mode Note: For detailed specifications of the PCM-3780, please refer to Appendix A Specifications. Table 1.2: PCM-3780 Counter Mode 1.2 Applications 1.3 Installation Guide Page 1.4 Software Overview 1.4.1 Device Drivers (on the companion CD-ROM) 1.4.2 Device Drivers 1.4.3 Register-level Programming 1.5 Device Drivers Programming Roadmap 1.5.1 Programming Tools 1.5.2 Programming with Device Drivers Function Library 1.5.3 Troubleshooting Device Drivers Error 1.6 Accessories 1.6.1 Wiring Cables 1.6.2 Wiring Boards Page Chapter 2 Hardware Installation 2.1 Unpacking 2.2 Driver Installation Page 2.3 Hardware Installation 2.3.1 Installing the Module Page Pin Assignments & Jumper Settings Page 3.3 Switch and Jumper Settings Page Page Page 3.5 Period Measurement 3.5.1 Using Advantech 32-bit DLL Driver 3.5.2 Using Direct I/O 3.6 Frequency Measurement 3.6.1 Using Advantech 32-bit DLL Driver 3.6.2 Using Direct I/O Page Appendix A Specifications A.1 Programmable Counter A.2 Digital Input/Output A.3 General Page Page Page Page Appendix C Register Structure & Format C.1 Overview C.2 I/O Port Address Map 33 Appendix C C.2.1 Register Format Table C.1: Register Offset Address Table PCM-3780 User Manual 34 35 Appendix C C.3 Counter 0/1 Mode Register CM6: 0 = Disable edge disarm in edge gate mode 1 = Enable edge disarm in edge gate mode CM5: 0 = Reload from Load 1 = Reload from Load or Hold Page 37 Appendix C C.4 Counter 0/1 Load Register: 1. CL15 to CL0: Counter load data 1. CH15 to CH0: Counter hold data C.5 Counter 0/1 Hold Register C.6 Counter 0/1 Command Register C.7 Counter Command Enable Register C.8 Interrupt Control Register C.9 Interrupt Status Register PCM-3780 User Manual 40 C.10 Interrupt Clear Register Write any data to these two bytes to clear the interrupt. C.11 I/O Direction Control Register 1. I/O Direction Control Bit: 0 = Output 1 = Input C.12 Port A/B/C Interrupt Status Register C.13 FOUT Register Page D Appendix D Waveform of Each Mode D.1 Counter Mode Descriptions (N: No gate control, L: Level gate control, E: Edge gate control) Table D.1: PCM-3780 Counter Mode Page D.2 Mode A Waveforms D.3 Mode B Waveforms D.4 Mode C Waveforms D.5 Mode D Waveforms D.6 Mode E Waveforms D.7 Mode F Waveforms D.8 Mode G Waveforms D.9 Mode H Waveforms D.10 Mode I Waveforms D.11 Mode J Waveforms D.12 Mode K Waveforms D.13 Mode L Waveforms 59 Appendix D D.14 Mode O Waveforms Hardware-Triggered Strobe with Edge Disarm Mode O Waveforms PCM-3780 User Manual 60 D.15 Mode R Waveforms Non-Retriggerbale One-Shot with Edge Disarm Mode R Waveforms 61 Appendix D D.16 Mode U Waveforms Hardware-Triggered Delayed Pulse Strobe with Edge Disarm Mode U Waveforms PCM-3780 User Manual 62 D.17 Mode X Waveforms Hardware-Triggered Delayed Pulse One-Shot with Edge Disarm Mode X Waveforms