upd6461 Renesas Electronics Corporation., upd6461 Datasheet - Page 40

• Manufacturer Part Number: upd6461
• Description: Cmos Lsi Chip For Camcorder On-screen Character Display 12 Rows X 24 Columns
• Manufacturer: Renesas Electronics Corporation.

40
5. CHARACTER PATTERNS
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 ( µ PD6461)/
7EH ( µ PD6462) and end code for second-byte continuous input at FFH ( µ PD6461)/7FH ( µ PD6462) cannot be modified.
No character pattern can be stored at these addresses.
( µ PD6462), the character pattern is called blank data. Character address FEH ( µ PD6461)/7EH ( µ PD6462) 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:
option. Blank data, however, can be specified at any address from 00H to FDH ( µ PD6461)/00H to 7DH ( µ PD6462) (address
FFH ( µ PD6461)/7FH ( µ PD6462) cannot be used because it contains the end code for second-byte continuous input).
following pages.
The µ PD6461, 6462 can display 256 ( µ PD6461)/128 ( µ PD6462) character patterns, including alphanumerics, Kanji
When none of the 12 × 18 dots are filled for a character pattern at addresses 00H to FDH ( µ PD6461)/00H to 7DH
You cannot specify display-off data for addresses other than FEH ( µ PD6461)/7EH ( µ PD6462) when using a mask code
The character patterns of the µ PD6461GS-101/102, µ PD6462GS-001 (NEC’s standard model) are shown on the
Blank data
Display-off data
Character data
Table 5-1 The Differences between Blank Data and Display-off Data
Displays image.
Displays image.
No background
Data Sheet S13320EJ2V0DS
Display of character area in each background mode
Displays background.
Displays image only
(without background).
Minimum background
Displays background.
Displays image only
(without background).
Overall background
µ PD6461, 6462