Z90251 ZILOG [Zilog, Inc.], Z90251 Datasheet - Page 34

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

The Second Color feature can be used to implement an analog bar for volume
control, tuning, etc. The change step for color is half the character size. Refer to
Tables 8 and 9.
Second Color Control Register
The Second Color Position is the place where the foreground color changes to the
color defined in the Second Color Control Register.
Table 11 Second Color Control Register 07h:Bank A (SNDCLR_CNTRL)
Second Color Register
Table 12 Second Color Register 08h:Bank A (SNDCLR)
Bit
R/W
Reset
Note: R = Read W = Write X = Indeterminate
Bit/
Field
Second Color Enable
Second Color
Row Address
Bit
R/W
Reset
Note: R = Read W = Write X = Indeterminate
7
7
R/W
R/W
0
x
Bit
Position R/W Value Description
7
6, 5, 4
3, 2, 1, 0 R/W
6
6
R/W
R/W
0
0
5
5
R/W
R/W
R/W
R/W
0
0
4
4
32 KB Television Controller with OSD
R/W
R/W
0
1
0
0
Disables the second color feature
Enables the second color feature
R, G, B respectively. Defines the
second color after the second color
position defined in SNDCLR register.
Defines one of the 10 rows (from 0, the
first row, to 9, the 10th row).
3
3
R/W
R/W
0
0
2
2
R/W
R/W
0
0
1
1
R/W
R/W
PS001301-0800
0
0
0
0
R/W
R/W
0
0
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