Advantech PCI-1220U, User Manual, Page: 39 / 56

33 Chapter 3
3.15.3 Interpolation Driving
Figure 3.23: Timing Diagram of Interpolation Driving
• After interpolation command is enable, the first pulse will be outputted
in 775 nsec.
• If using pulse/direction mode, direction signal (nP-P) is valid in ± 125
nsec of high-level pulse signal.
3.15.4 Input Pulse Timing
Quadrature Pulse of Encoder Input
Figure 3.24: Quadrature Pulse of Encoder Input
• The minimum difference time between A/B phases is 200 nsec.
UP/DOWN Pulse Input
Figure 3.25: Timing Diagram of Up/Down Pulse Input
• Minimum UP/DOWN pulse width: 130 nsec.
• Minimum Increased/Decreased Pulse Interval: 130 nsec .
• Minimum UP/DOWN pulse period: 260 nsec.