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FT810Q-X Datasheet, PDF (23/60 Pages) Future Technology Devices International Ltd. – Embedded Video Engine
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Table 4-7 Font table format
Address Offset
Size(byte)
0
128
128
4
132
4
136
4
140
4
144
4
Document No.: FT_001165
FT81X Embedded Video Engine
Datasheet Version 1.2
Clearance No.: FTDI#440
Parameter Description
width of each font character, in pixels
font bitmap format, for example L1, L4 or L8
font line stride, in bytes
font width, in pixels
font height, in pixels
pointer to font image data in memory
The ROM fonts are stored in the memory space ROM_FONT. The ROM font table is also stored in the
ROM. The starting address of the ROM font table for font index 16 is stored at ROM_FONT_ADDR, with
other font tables following. The ROM font table and individual character width (in pixel) are listed in Table
4-8 through Table 4-10. Font index 16, 18 and 20-31 are for basic ASCII characters (code 0-127), while
font index 17 and 19 are for Extended ASCII characters (code 128-255). The character width for font
index 16 through 19 is fixed at 8 pixels for any of the ASCII characters.
Table 4-8 ROM font table
Font Index
1111222222222233333
6789012345678901234
Font format
LLLLLLLLLLLLLLLLLLL
1111111111444444444
Line stride
1
1
1
1
2
2
2
3
3
4
7
8
9
1
1
1
4
1
8
2
3
3
0
3
9
Font width
(max)
8
8
8
8
1
1
1
3
1
7
1
8
2
5
3
4
1
3
1
5
1
9
2
1
2
8
3
7
4
9
6
3
8
2
Font height
8
8
1
6
1
6
1
3
1
7
2
0
2
2
2
9
3
8
1
6
2
0
2
5
2
8
3
6
4
9
6
3
8
3
1
0
8
Image
pointer start
address
(hex)
Table 4-9 ROM font ASCII character width in pixels
Font Index 16/ 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3
=> 18 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
0 NULL 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 SOH 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2 STX 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3 ETX 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
4 EOT 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
5 ENQ 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
6 ACK 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
7 BEL 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
8
BS
8 000000000000000
9
HT
8 000000000000000
10 LF
8 000000000000000
11 VT
8 000000000000000
12 FF
8 000000000000000
13 CR
8 000000000000000
14 SO
8 000000000000000
15 SI
8 000000000000000
16 DLE 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
17 DC1 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
18 DC2 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
19 DC3 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
20 DC4 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Copyright © 2015 Future Technology Devices International Limited
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