HD64F2149YV datasheet(436/1075 Pages) RENESAS

436 / 1075 page

Section 13 Timer Connection

Rev. 3.00 Jan 18, 2006 page 408 of 1044

REJ09B0280-0300

Mode

IVI Signal

IVO Signal

Meaning of IVO Signal

Separate

mode

VSYNCI

input

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

modification, without IHI

synchronization)

VSYNCI input (vertical synchronization signal)

fall is modified before output

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

13.3.9

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 composition logic is shown in figure 13.9.

Reset

Set

CBLANK signal

(positive)

HFBACKI input (positive)

VFBACKI input (positive)

IVO signal (positive)

Falling edge sensing

Rising edge sensing

Figure 13.9 CBLANK Output Waveform Generation

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