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

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UPD6464A

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

NEC => Renesas Technology 

µPD6464A,6465

2.6 Video Signal Method Control Command

The µPD6464A, 6465 can select the NTSC, PAL, and PAL-M methods for the internal video signal.

The µPD6464A can also select the PAL-N method.

When the SECAM method is selected, the internal video signal is output by the PAL method.

D7 D6 D5 D4 D3 D2 D1 D0

0

1

0

0

1 N/P2Note N/P1 N/P0

Video signal method control bits

N/P2 N/P1 N/P0

Function

0

0

0 NTSC

0

0

1 PAL

0

1

0 PAL-M

0

1

1 SECAM

1

0

0 PAL-N

Setting prohibited

Note Fixed to “0” (µPD6465).

• Video signal method control bits

These bits can generate internal NTSC, PAL, PAL-M and PAL-N (µPD6464A only) video signals.

With the SECAM method, however, a color subcarrier from the SECAM color subcarrier input pin (pin 22) is fixed

in the external mode. In the internal mode, an internal PAL video signal is generated.

The internal video signal is generated by using a ×4 multiplier or an external crystal. Use a crystal with a frequency

of 4 fSC for each video signal.

15

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