On-Screen Display
VRAM
MN102H75K/F75K/85K/F85K LSI User Manual
Panasonic Semiconductor Development Company
169
Panasonic
7.8.2
VRAM Organization
Notes:
1. All addresses are expressed in hex notation. Other values are decimal.
2. GRAMEND: Graphics RAM end address (programmable to any address)
3. CRAMEND: Text RAM end address (programmable to any address)
4. M: Number of lines in the text layer
5. m: 1 and up
6. N: Number of lines in the graphics layer
7. n: 1 and up
Figure 7-6 VRAM Organization (When GEXTE = 0)
GRAMEND
−
3F
GRAMEND
−
3E
GRAMEND
−
3D
GRAMEND
−
3C
GRAMEND
−
3B
GRAMEND
−
3A
GRAMEND
−
2F
GRAMEND
−
2E
GRAMEND
−
3
GRAMEND
−
2
GRAMEND
−
1
GRAMEND
Unused area
Unused area
Code 30
Code 29
.
.
.
Code 2
Code 1
2 bytes
Low-order 8 bits
of graphics code
High-order 8 bits
of graphics code
GRAMEND
−
40
×
N
+
5
GRAMEND
−
40
×
(N
−
1)
GRAMEND
−
40
×
n
+
5
GRAMEND
−
40
×
(n
−
1)
GRAMEND
−
7B
GRAMEND
−
40
GRAMEND
−
3B
GRAMEND
Line N data
.
.
.
Line n data
.
.
.
Line 2 data
Line 1 data
64 bytes
Graphics RAM Addresses
(When GEXTE = 1)
CRAMEND
−
4F
CRAMEND
−
4E
CRAMEND
−
4D
CRAMEND
−
4C
CRAMEND
−
4B
CRAMEND
−
4A
CRAMEND
−
3
CRAMEND
−
2
CRAMEND
−
1
CRAMEND
Code 40
Code 39
Code 38
.
.
.
Code 2
Code 1
2 bytes
Low-order 8 bits
of text code
High-order 8 bits
of text code
CRAMEND
−
50
×
M
+
1
CRAMEND
−
50
×
(M
−
1)
CRAMEND
−
50
×
m
+
1
CRAMEND
−
50
×
(m
−
1)
CRAMEND
−
9F
CRAMEND
−
50
CRAMEND
−
4F
CRAMEND
Line M data
.
.
.
Line m data
.
.
.
Line 2 data
Line 1 data
80 bytes
Text RAM Addresses
GRAMEND
−
40
×
N
+
5
GRAMEND
CRAMEND
−
50
×
M
+
1
CRAMEND
Program
Data
and
Stack
Area
Graphics
VRAM
Text
VRAM
x'009FFF'
x'008000'
Summary of Contents for MN10285K
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