Rainbow Electronics AT75C220 - Manual (Page 113)

AT75C220
113
• EEVTEDG: External Event Edge Selection
• EEVT: External Event Selection
Note: 1. If TIOB is chosen as the external event signal, it is configured as an input and no longer generates waveforms.
• ENETRG: External Event Trigger Enable
0 = The external event has no effect on the counter and its clock. In this case, the selected external event only controls
the TIOA output.
1 = The external event resets the counter and starts the counter clock.
• CPCTRG: RC Compare Trigger Enable
0 = RC Compare has no effect on the counter and its clock.
1 = RC Compare resets the counter and starts the counter clock.
• WAVE
0 = Waveform mode is disabled (Capture mode is enabled).
1 = Waveform mode is enabled.
• ACPA: RA Compare Effect on TIOA
• ACPC: RC Compare Effect on TIOA
EEVTEDG Edge
0 0 None
0 1 Rising edge
1 0 Falling edge
1 1 Each edge
EEVT
Signal Selected as
External Event TIOB
Direction
0 0 TIOB Input (1)
0 1 XC0 Output
1 0 XC1 Output
1 1 XC2 Output
ACPA Effect
0 0 None
0 1 Set
1 0 Clear
1 1 Toggle
ACPC Effect
0 0 None
0 1 Set
1 0 Clear
1 1 Toggle