HD64F2145 Datasheet, PDF (362/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Mode
Separate
mode
IVI Signal
VSYNCI
input
IVO Signal
Meaning of IVO Signal
IVI signal (without fall
modification or IHI
synchronization)
VSYNCI input (vertical synchronization signal)
is output directly
IVI signal (without fall
modification, with IHI
synchronization)
Meaningless unless VSYNCI input (vertical
synchronization signal) is synchronized with
HSYNCI input (horizontal synchronization
signal)
IVI signal (with fall
VSYNCI input (vertical synchronization signal)
modification, without IHI fall is modified before output
synchronization)
IVI signal (with fall
modification and IHI
synchronization)
VSYNCI input (vertical synchronization signal)
fall is modified and signal is synchronized with
HSYNCI input (horizontal synchronization
signal) before output
IVG signal
Internal synchronization signal is output
13.4.9 CBLANK Output
Using the signals generated/selected with timer connection, it is possible to generate a waveform
based on the composite synchronization signal (blanking waveform).
One kind of blanking waveform is generated by combining HFBACKI and VFBACKI inputs,
with the phase polarity made positive by means of bits HFINV and VFINV in TCONRI, with the
IVO signal.
The logic of CBLANK output waveform generation is shown in figure 13.9.
HFBACKI input (positive)
VFBACKI input (positive)
IVO signal (positive)
Falling edge sensing Reset
Q
Rising edge sensing Set
CBLANK signal
(positive)
Figure 13.9 CBLANK Output Waveform Generation
Rev. 2.0, 08/02, page 322 of 788