Z90251 ZILOG [Zilog, Inc.], Z90251 Datasheet - Page 46

• Manufacturer Part Number: Z90251
• Description: eZVision 200 Television Controllers with OSD
• Manufacturer: ZILOG [Zilog, Inc.]

The Hex Add column is a hexadecimal number that serves as an address for the
group of pixels from the starting point of the scan line. Addressing begins at
0000h and ends at 0023h for the first character. There is an address gap
between characters. The starting address for the second character is 0040h.
Each bit in the map sets the foreground/background designation of the
corresponding pixel:
The patterns formed by the bits comprise the characters that are displayed when
the scan line is output to the screen.
Each of these character pixel maps is one character; 512 characters can be
mapped.
Several characters can be combined to form a large icon. Figures 13 is an
example of a large icon. Each block marked by the darker grid lines is 14 x 18
pixels, one character.
Figure 13 Example of a Multiple Character Icon
0 background pixel
1 foreground pixel
No spacing
No Spacing
Fringing Effect
6HL
Spacing
Row 4
Row 5
Row 6
Row 7
32 KB Television Controller with OSD
PS001301-0800
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