Functional description

STV9211

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2.19

Specific application conditions

q

at the expense of output swing voltage.The CRT Heater voltage (6.2V Typ.) is used very often to

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Functioning without blanking pulse

If no blanking pulse is applied to the STV9211, it is necessary to ensure the OCL pulse generation

(which sets the infra-black level) by setting the Register 8, bit7=1 (OCL = BPCP).

To ensure the device correct behavior in the worst possible conditions, the brightness Register must

be set to 0.

q

Soft blanking

It is possible to blank the video signal by setting the Register 9, bit1=1 and Register 8, bit 6=1.

In this mode the output voltage is set to Vib (see

changing the timing resolution of the video, in order to suppress the video during this transient

period.

Figure 14: Soft blanking

Feature

Soft Blanking

Register 9, bit1 (*)

Channel

3 channels

simultaneously

Register

name & address

Case #1: Normal operation

Register 9, bit1=0

Case #2: Soft Blanking mode

Register 9, bit1=1

(*) Register 8, bit6 must be set to 1 too

Black level

Infra-black