UPD6464A Просмотр технического описания (PDF) - NEC => Renesas Technology

Номер в каталоге

Компоненты Описание

производитель

UPD6464A

ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR

NEC => Renesas Technology 

µPD6464A,6465

2.10 Output Level Control Command

The µPD6464A, 6465 can set the luminance level of the character and background (including the frame) by

using a command.

This command is a 2-byte command, and must be input in 16-bit units even when successively input.

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

10

010

0

0 VPD 0 0

00

0

1 VC1 VC0

Character level control bits

VC1 VC0

Function

0

0 Setting Prohibited

0

1 75 I.R.E.

1

0 Setting Prohibited

1

1 90 I.R.E.

Internal video signal amplitude control bit

VPD

Function

0

1 Vp-p amplitude

1

2 Vp-p amplitude

• Character level control bits

These bits can select two character luminance levels: 75 or 90 I.R.E.

If these bits are not set, the character level is set to 75 I.R.E.

Remark The background (frame) level is fixed to 0 I.R.E.

• Internal video signal amplitude control bit

This bit sets the amplitude of the internal video signal to 1 or 2 Vp-p (this amplitude must match the amplitude of

the signal input in the external video signal mode). When the amplitude is set to 1 Vp-p, the voltage applied to the

VCNT pin must be 2.5 V.

When the amplitude is set to 2 Vp-p, apply 5 V to the VCNT pin.

20

Share Link: