UPD6465CS datasheet(9/52 Pages) NEC

9 / 52 page

µPD6464A,6465

2.2

Display Control Command

This command turns ON/OFF the display and controls LC oscillation and blinking of characters.

BL1

BL0

Blinking control bits

BL1

BL0

Function

Blinking OFF

Blinking frequency: about 2 Hz

Blinking frequency: about 0.5 Hz

Display ON/OFF control bit

Function

Display OFF

Display ON

LC oscillation control bit

Function

LC oscillation OFF

LC oscillation ON

Blinking frequency: about 1 Hz

•

Blinking control bits

These bits blink the character that is specified by the display character control command.

The blinking ratio is 1:1, and three blinking frequencies can be selected.

Blinking in character units can be specified by the display character control command.

•

LC oscillation control bit

This bit controls LC oscillation and can turn ON/OFF the oscillation circuit. While no character is displayed,

oscillation can be stopped to reduce the power dissipation.

Data cannot be written to the video RAM with oscillation stopped. To write data to the video RAM, be sure to turn

ON oscillation.

Remark

Oscillation is synchronized with Hsync when display is ON and LC oscillation is ON, and oscillation

is stopped while Hsync is low. When display is OFF and LC oscillation is ON, oscillation is performed,

regardless of the level of Hsync.

•

Display ON/OFF control bit

This bit turns ON/OFF the display output. The display is turned ON/OFF in synchronization with the fall of Hsync.

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