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Chapter 7 Usage of Various Functions
7-8
(d) 2-phase multiplication mode (MUL4)
- Up or Down is set automatically by the phase difference between A and B phase.
•
Up counter
- At the rising edge of A-Phase pulse when B-phase is ‘low’.
- At the falling edge of A-Phase pulse when B-phase is ‘high’.
- At the rising edge of B-Phase pulse when A-phase is ‘high’.
- At the falling edge of B-Phase pulse when A-phase is ‘low’.
•
Up counter
- At the rising edge of A-Phase pulse when B-phase is ‘high’.
- At the falling edge of A-Phase pulse when B-phase is ‘low’.
- At the rising edge of B-Phase pulse when A-phase is ‘low’.
- At the falling edge of B-Phase pulse when A-phase is ‘high’.
(3) Preset setting
(a) Internal Preset
- Set internal preset area and preset value.
- Current value of high speed counter is replaced with preset value at the rising edge of internal preset device.
(b) External Preset
- Set external preset area and preset value.
- External devices are fixed as following
Ch0 : P4, Ch1 : P5, Ch2 : P6, Ch3 : P7
- Current value of high speed counter is replaced with preset value at the rising edge of external preset device.
B-phase input pulse
Current value
A-phase input pulse
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