MC141585 查看數據表（PDF） - Motorola => Freescale
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MC141585 Datasheet PDF : 27 Pages
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ROM
MC141585 contains 512 character ROM. Physical ROM
includes 128-ROM Page 0 and six 64-ROM Pages(1-6).
User can define these character ROM in mask ROM layer.
Addressable/logical ROM includes Bank A, Bank B and
Bank C. Bank A address range is $00-7F where 16 color
fonts locate in $01-$10, blank in $00 and fill in $7F. It is direct
mapping of Page 0. Bank B address range is $80-BF and
Bank C address range is $C0-FF. Content of Bank B and
Bank C are selected by Page Selection Register which
determine the Page mapping, Page1 to Page 6.
format . So do not use the two dots at right most in the 12x18
dot matrix when designing 10x18 fonts for custom mask
ROM:
fonts designed to be 12x18 display
Physical ROM
128-ROM Page 0
(112+16 color fonts)
64-ROM Page 1
64-ROM Page 2
64-ROM Page 3
64-ROM Page 4
64-ROM Page 5
Logical ROM
Blank
00 01 16 color fonts
10
BANK A
112 Normal fonts
7F
Fill
80
BANK B
BF
C0
BANK C
FF
TOTAL 256 ROM
64-ROM Page 6
TOTAL 512 ROM X C2 C1 C0 X B2 B1 B0
Page Selection Register
(ROW 16, Coln 4)
Output display if FSS=1; last two dots ommitted
fonts designed to be 10x18 display
Figure 15. Character ROM Mapping
10x18 and 12x18 Font
There is no physcial difference between 10x18 and
12x18 fonts inside MC141585 character ROM. All the 512
characters are masked in 12x18 format.
But once the FSS bit in Special Register (ROW16:Coln0)
is set to 1, the RGB output will change to 10x18 display for-
mat. That is, only the first 10 dots in every line of the original
character will be displayed, the last two dots will be omit-
ted.Then all characters in OSD menu will be in 10x18 display
MOTOROLA
Output display when FSS=1
Figure 16. 12x18 &10x18 fonts
MC141585
17
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