UPD6461GS Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD6461GS

CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY (12 ROWS × 24 COLUMNS)

NEC => Renesas Technology 

µPD6461, 6462

3.8 OUTPUT PIN CONTROL COMMAND

This command distributes character signals to the VC1 and VC2 channels (this command is a 2-byte command, requiring

16 bits for each command, even when continuously input). The µPD6461, 6462 support a mask option for selecting one

of three formats for the output distribution format for the VC1 and VC2 channels.

(1) For MSB-first transfer (Command bits are input starting from the MSB (D15).)

(MSB)

(LSB)

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

1

0

0

1

1

1

0

0

VC2

VC1

0

0 AR3 AR2 AR1 AR0

AR3 AR2

0

0

0

0

Row specification bits

AR1 AR0

Function

0

0

Specifies row 0.

0

1

Specifies row 1.

1

0

1

1

Specifies row 11.

Other values are invalid.

Option A

VC2

0

0

Output pin control bits

VC1

Output from each pin

0 VC1: Outputs a specified row. VC2: Fixed to low level.

1 VC1: Fixed to low level. VC2: Outputs a specified row.

Option B

VC2

0

0

Output pin control bits

VC1

Output from each pin

0 VC1: Outputs all rows. VC2: Fixed to low level.

1 VC1: Outputs all rows. VC2: Outputs a specified row.

Option C

VC2

0

0

1

1

Output pin control bits

VC1

Output from each pin

0 VC1: Outputs columns 0 to 23. VC2: Fixed to low level.

1 VC1: Outputs columns 0 to 11. VC2: Outputs columns 12 to 23.

0 VC1: Outputs columns 12 to 23. VC2: Outputs columns 0 to 11.

1 VC1: Fixed to low level. VC2: Outputs columns 0 to 23.

(2) For LSB-first transfer (Command bits are input starting from the LSB (D0). The function of each bit is the same as

that for MSB-first transfer.)

(LSB)

(MSB)

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

0

0

1

1

1

0

0

1 AR0 AR1 AR2 AR3 0

0

VC1

VC2

• Row specification bits

Output distribution to the VC1 and VC2 pins is specified for each row (or for 12 columns). These bits are used to

specify the row.

• Output pin control bits

These bits are used to distribute character output signals to the VC1 and VC2 pins depending on whether option

A, B, or C has been selected by specifying a mask option (the corresponding blanking signals are output likewise).

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