UPD6461GS datasheet(40/60 Pages) NEC

40 / 60 page

µPD6461, 6462

5. CHARACTER PATTERNS

The

µPD6461, 6462 can display 256 (µPD6461)/128 (µPD6462) character patterns, including alphanumerics, Kanji

characters, and symbols, which are stored in the character generator ROM. Each pattern in the character generator ROM

can be modified by specifying a mask code option. However, the display-off data at character address FEH (

µPD6461)/

7EH (

µPD6462) and end code for second-byte continuous input at FFH (µPD6461)/7FH (µPD6462) cannot be modified.

No character pattern can be stored at these addresses.

When none of the 12

× 18 dots are filled for a character pattern at addresses 00H to FDH (

µPD6461)/00H to 7DH

(

µPD6462), the character pattern is called blank data. Character address FEH (µPD6461)/7EH (µPD6462) contains display-

off data. Blank data and display-off data are represented in the same way (with no dots filled) in character patterns shown

on the following pages, but they are different as follows:

Table 5-1 The Differences between Blank Data and Display-off Data

You cannot specify display-off data for addresses other than FEH (

µPD6461)/7EH (µPD6462) when using a mask code

option. Blank data, however, can be specified at any address from 00H to FDH (

µPD6461)/00H to 7DH (µPD6462) (address

FFH (

µPD6461)/7FH (µPD6462) cannot be used because it contains the end code for second-byte continuous input).

The character patterns of the

µPD6461GS-101/102, µPD6462GS-001 (NEC’s standard model) are shown on the

following pages.

No background

Minimum background

Overall background

Display of character area in each background mode

Character data

Blank data

Display-off data

Displays image.

Displays background.

Displays image only

(without background).

Displays background.

Displays image only

(without background).

UPD6461GS bảng dữ liệu(PDF) 40 Page - NEC