SII DPU-S245, Техническое описание

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6-111
Address Structure for font data
Structure of Japanese
<2-byte download>
Font data for 1 character is configured as the figure below.
Padding data of 1 byte is added to 24 dots font data every 3 bytes.
Therefore, 1 character font data requires 96 + 32 = 128 bytes.
Character code (JIS) correspond to initial address of font data as shown below. The table shows
initial address in 20 bits as A19 to A0.
Character code (JIS) are indicated by upper byte in b7 to b0 and lower byte in a7 to a0.
Example: Obtaining for registration address of ” 亜 ” (JIS code:3021H)
<1-byte download>
Font data for 1 character is configured as the figure below.
24 dots font data is registered by repeating data of 2 bytes every 2 times.
16 dots font data is registered by repeating data of 1 byte every 2 times.
Therefore, 1 character font data requires 96 + 32 = 128 bytes.
d1 d2 d1 d2
d47 d48 d47 d48
d1 d1 d2 d2
d15 d15 d16 d16
d3 d4 d3 d4
24 dots font
data storing area
(96 bytes)
16 dots font
data storing area
(32 bytes)
d1 d2 d3 padding data
d70 d71 d72 padding data
d1 d2 d3 d4
d29 d30 d31 d32
d4 d5 d6 padding data
24 dots font
data storing area
(96 bytes)
16 dots font
data storing area
(32 bytes)
A19 A18 A17 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
0 a6 a5 b2 b1 b0 0 0 a4 a3 a2 a1 a0 0 0 0 0 0 0 0 Unregistered area （ 2121H ～ 2840H ）
0 b6 b3 b2 b1 b0 a6 a5 a4 a3 a2 a1 a0 0 0 0 0 0 0 0
JIS 1st level
（
3021H
～
4F53H
）
1 b5 b3 b2 b1 b0 a6 a5 a4 a3 a2 a1 a0 0 0 0 0 0 0 0
JIS 2nd level （ 5021H ～ 6F7EH ）
1 a6 a5 b2 b1 b0 0 0 a4 a3 a2 a1 a0 0 0 0 0 0 0 0
JIS 2nd level
（
7021H
～
7426H
）
Area
b7 b6 b5 b4 b3 b2 b1 b0
Upper byte: 30H 0 0 1 1 0 0 0 0 B
a7 a6 a5 a4 a3 a2 a1 a0
Lower byte: 21H 0 0 1 0 0 0 0 1 B
A19 A18 A17 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
Initial address
：
0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 B
Address
：
Register font data of 128 bytes from the address of 01080H