CXA3272R データシートの表示（PDF） - Sony Semiconductor

部品番号

コンポーネント説明

メーカー

CXA3272R

Driver/Timing Generator for Color LCD Panels

Sony Semiconductor 

CXA3272R

Setting Conditions for Measuring Electrical Characteristics

The following setting is required while measuring electrical characteristics.

Setting 1. System reset

After turning on the power, set SW58 to ON and start up V58 from GND in order to activate the

MOS block system reset. (See Fig. 1-1.)

The serial bus is set to the default values.

Setting 2. Horizontal AFC adjustment

• When using the internal VCO

Input SIG4 (VL = 0mV) to (A) and adjust serial bus register VCO so that the TP5 phase comparison

output waveform is flat. (See Fig. 1-2.)

• When using the external VCO

Input SIG4 (VL = 0mV) to (A) and adjust VR1 so that WL = WH in the TP5 phase comparison

output waveform. (See Fig. 1-3.)

Note) VCO internal/external switching is performed by Pin 12 (SLVCO).

When using the internal VCO, connect Pin 12 to GND and set SW5 and SW7 in the Electrical Characteristics

Measurement Circuit to B.

When using an external VCO, connect Pin 12 to VDD and set SW5 and SW7 in the Electrical Characteristics

Measurement Circuit to A.

Note) When measuring a band of 2MHz or more such as Y signal frequency response or sharpness

characteristics among the items being measured, the measurement must be made with the sample-

and-hold circuit set to through by the serial bus.

VDD1, VDD2

V58 (RESET)

Tr

Tr > 10µs

Fig. 1-1. System reset

SIG4

V-sync

TP5

SIG4

TP5

H-sync

WS

TP5

Approximately 1/2VDD

WL WH

Fig. 1-2. Horizontal AFC adjustment

(when using the internal VCO)

– 10 –

Fig. 1-3. Horizontal AFC adjustment

(when using an external VCO)

Share Link: