Mode E Waveforms | Advantech PCM-3780 guide

D.6 Mode E Waveforms

Rate Generator with Level Gating

Mode E is identical to Mode D, except the counter will only count those source edges that occur while the gate input is active. This feature allows the counting process to be enabled and disabled under hardware control. A square wave rate generator may be obtained by specifying the TC tog- gled output mode.

SOURCE

GATE

COUNT

2

1

0

L

L-1

L-2

K+1

K

K-1

2

1

0

L

VALUE

TC OUTPUT

TC TOGGLED

OUTPUT

Mode E Waveforms

51

AppendixD

Image 59

Advantech PCM-3780 manual Mode E Waveforms, Rate Generator with Level Gating

Contents

PCM-3780 Ch Counter/Timer with Ch TTL DIO Module Copyright Acknowledgements Two Years Product Warranty CE Notification FCC Class a Technical Support and Assistance Packing List Page Contents Appendix Specifications Introduction Features Counter Modes PCM-3780 Counter Mode PCM-3780 Counter Mode Applications Installation Guide Installation Flow Chart Register-level Programming Software OverviewDevice Drivers on the companion CD-ROM Device Drivers Programming Tools Device Drivers Programming Roadmap Programming with Device Drivers Function Library Troubleshooting Device Drivers Error Wiring Boards AccessoriesWiring Cables Hardware Installation Unpacking Companion CD-ROM Driver Installation Different Options for Driver Setup Installing the Module Hardware InstallationPage Pin Assignments & Jumper Settings Overview Signal Connections Interrupt Level IRQ Setting JP1 Switch and Jumper Settings Base Address Setting Base Address Setting SW1 CN4 Counter Interface Connector Connectors Pin AssignmentCN3 I/O Port Connector Reference Direction Description Connector Signal Description Period Measurement Using Advantech 32-bit DLL DriverUsing Direct I/O Frequency Measurement Frequency Measurement Specifications Digital Input/Output Programmable Counter General Page Block Diagram Appendix B Block Diagram Register Structure & Format I/O Port Address Map Appendix C Register Structure & Format Table C.1 Register Offset Address Table Register Format CE CE CM6 to CM3 Count Control CM6 Counter 0/1 Mode RegisterCM2 Output Enable Control CM1 to CM0 Output Control CM15 Gate Active Edge or Level CM7 Count Source EdgeCM13 to CM12 Gate Source Selection CM14 Gating Polarity Selection Counter 0/1 Hold Register Counter 0/1 Load Register CE1 to CE0 Counter Command Enable Bit Counter 0/1 Command RegisterCounter Command Enable Register C2 to C0 Command Code Interrupt Status Register Interrupt Control Register O Direction Control Bit Interrupt Clear RegisterDirection Control Register Port A/B/C Interrupt Status Register DV3 to DV0 Fout Divider Divide by 1 to 16 0000 = Divide by Fout Register FS2 to FS0 Fout Source FOE Fout Output Enable Waveform of Each Mode Counter Mode Descriptions Appendix D Waveform of Each Mode Table D.1 PCM-3780 Counter Mode Table D.2 PCM-3780 Counter Mode Software-Triggered Strobe with No Hardware Gating Mode a Waveforms Software-Triggered Strobe with Level Gating Mode B Waveforms Hardware-Triggered Strobe Mode C Waveforms Rate Generator with No Hardware Gating Mode D Waveforms Rate Generator with Level Gating Mode E Waveforms Non-Retriggerable One-Shot Mode F Waveforms Software-Triggered Delayed Pulse One-Shot Mode G Waveforms Mode H Waveforms Hardware-Triggered Delayed Pulse Strobe Mode I Waveforms Variable Duty Cycle Rate Generator with No Hardware Gating Mode J Waveforms Variable Duty Cycle Rate Generator with Level Gating Mode K Waveforms Hardware-Triggered Delayed Pulse One-Shot Mode L Waveforms Hardware-Triggered Strobe with Edge Disarm Mode O Waveforms Non-Retriggerbale One-Shot with Edge Disarm Mode R Waveforms Hardware-Triggered Delayed Pulse Strobe with Edge Disarm Mode U Waveforms Hardware-Triggered Delayed Pulse One-Shot with Edge Disarm Mode X Waveforms