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PDF ST7920 Data sheet ( Hoja de datos )
| Número de pieza | ST7920 | |
| Descripción | Chinese Fonts built in LCD controller/driver | |
| Fabricantes | Sitronix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ST7920 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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ST
Sitronix
ST7920
Chinese Fonts built in LCD controller/driver
Main Features
l Operation Voltage Range:
Ø 2.7V to 5.5V
l Support 8-bit, 4-bit and serial bus MPU interface
l 64 x 16-bit display RAM (DDRAM)
Ø Supports 16 words x 4 lines (Max)
Ø LCD display range 16 words x 2 lines
l 64 x 256-bit Graphic Display RAM (GDRAM)
l 2M-bits Character Generation ROM (CGROM):
Support 8192 Chinese words (16x16 dot matrix)
l 16K-bit half-width Character Generation ROM
(HCGROM):
Supports 126 characters (16x8 dot matrix)
l 32-common x 64-segment (2 lines of character)
LCD drivers
l Automatic power on reset (POR)
l External reset pin (XRESET)
l With the extension segment drivers, the display
area can up to 16x2 lines
l Built-in RC oscillator:
Frequency is adjusted by an external resistor
l Low power consumption design
Ø Normal mode (450uA Typ VDD=5V)
Ø Standby mode (30uA Max VDD=5V)
l VLCD (V0 to VSS): max 7V
l Graphic and character mixed display mode
l Multiple instructions:
Ø Display Clear
Ø Return Home
Ø Display ON/OFF
Ø Cursor ON/OFF
Ø Display Character Blink
Ø Cursor Shift
Ø Display Shift
Ø Vertical Line Scroll
Ø Reverse Display (by line)
Ø Standby Mode
l Built-in voltage booster (2 times)
VOUT: max 7V
l 1/33 Duty (with ICON)
Function Description
ST7920 LCD controller/driver IC can display alphabets, numbers, Chinese fonts and self-defined characters. It
supports 3 kinds of bus interface, namely 8-bit, 4-bit and serial. All functions, including display RAM, Character
Generation ROM, LCD display drivers and control circuits are all in a one-chip solution. With a minimum system
configuration, a Chinese character display system can be easily achieved.
ST7920 includes character ROM with 8192 16x16 dots Chinese fonts and 126 16x8 dots half-width alphanumerical
fonts. Besides, it supports 64x256 dots graphic display area for graphic display (GDRAM). Mix-mode display with
both character and graphic data is possible. ST7920 has built-in CGRAM and provide 4 sets software programmable
16x16 fonts.
ST7920 has wide operating voltage range (2.7V to 5.5V). It also has low power consumption. So ST7920 is suitable
for battery-powered portable device.
ST7920 LCD driver consists of 32-common and 64-segment. Company with the extension segment driver (ST7921)
ST7920 can support up to 32-common x 256-segment display.
www.DataSheet4U.com Part Number
ST7920-0A
ST7920-0B
ST7920-0C
ST7920-0F
Font Code
BIG-5 Code Set (Traditional Chinese)
GB Code Set (Simplified Chinese)
Chinese (Traditional/Simplified) & Japanese
Chinese (Traditional/Simplified), Japanese & Korean
V4.0
1/49
2008/08/18
1 page  
ST7920
PAD Coordinates
No. Name
1 V0
2 V1
3 V2
4 CLK
5 TT1
6 TT2
7 V3
8 V4
9 VSS
10 VDD
11 XRESET
12 CL1
13 CL2
14 VDD
15 M
16 DOUT
17 RS
18 RW
19 E
20 VSS
21 OSC1
22 OSC2
23 PSB
24 D0
25 D1
26 D2
27 D3
28 D4
29 D5
30 D6
31 D7
32 XOFF
33 VOUT
34 CAP3M
35 CAP1P
www.DataShee3t46U.comCAP1M
37 CAP2P
38 CAP2M
X
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2548
-2306
-2181
-2056
-1931
-1806
-1681
-1556
-1431
Y
1812
1688
1562
1438
1312
1188
1062
938
812
688
562
438
312
188
62
-62
-188
-312
-438
-562
-688
-812
-938
-1062
-1188
-1312
-1438
-1562
-1688
-1812
-1933
-1933
-1933
-1933
-1933
-1933
-1933
-1933
V4.0
(Unit: um)
No. Name
X
Y
39 VD2 -1306 -1933
40 C[1] -1181 -1933
41 C[2] -1056 -1933
42 C[3] -931 -1933
43 C[4] -806 -1933
44 C[5] -681 -1933
45 C[6] -556 -1933
46 C[7] -431 -1933
47 C[8] -306 -1933
48 C[9] -181 -1933
49 C[10]
-56 -1933
50 C[11]
69 -1933
51 C[12] 194 -1933
52 C[13] 319 -1933
53 C[14] 444 -1933
54 C[15] 569 -1933
55 C[16] 694 -1933
56 C[17] 819 -1933
57 C[18] 944 -1933
58 C[19] 1069 -1933
59 C[20] 1194 -1933
60 C[21] 1319 -1933
61 C[22] 1444 -1933
62 C[23] 1569 -1933
63 C[24] 1694 -1933
64 C[25] 1819 -1933
65 C[26] 1944 -1933
66 C[27] 2069 -1933
67 C[28] 2194 -1933
68 C[29] 2319 -1933
69 C[30] 2548 -1812
70 C[31] 2548 -1688
71 C[32] 2548 -1562
72
C[33]
Not use
2548 -1438
73 S[64] 2548 -1312
74 S[63] 2548 -1188
75 S[62] 2548 -1062
76 S[61] 2548 -938
5/49
2008/08/18
5 Page 
ST7920
Display Data RAM (DDRAM)
There are 64x2 bytes RAM spaces for the Display Data RAM. It can store display data such as 16 characters (16x16)
by 4 lines or 32 characters (8x16) by 4 lines. However, only 2 character-lines (maximum 32 common outputs) can be
displayed at one time. Character codes stored in DDRAM will refer to the fonts specified by CGROM, HCGROM and
CGRAM.
ST7920 can display half-width HCGROM fonts, user-defined CGRAM fonts and full 16x16 CGROM fonts. The
character codes in 0000H~0006H will use user-defined fonts in CGRAM. The character codes in 02H~7FH will use
half-width alpha numeric fonts. The character code larger than A1H will be treated as 16x16 fonts and will be
combined with the next byte automatically. The 16x16 BIG5 fonts are stored in A140H~D75FH while the 16x16 GB
fonts are stored in A1A0H~F7FFH. In short:
1. To display HCGROM fonts:
Write 2 bytes of data into DDRAM to display two 8x16 fonts. Each byte represents 1 character.
The data is among 02H~7FH.
2. To display CGRAM fonts:
Write 2 bytes of data into DDRAM to display one 16x16 font.
Only 0000H, 0002H, 0004H and 0006H are acceptable.
3. To display CGROM fonts:
Write 2 bytes of data into DDRAM to display one 16x16 font.
A140H~D75FH are BIG5 code, A1A0H~F7FFH are GB code.
The higher byte (D15~D8) is written first and the lower byte (D7~D0) is the next.
Please refer to Table 5 for the relationship between DDRAM and the address/data of CGRAM.
CGRAM fonts and CGROM fonts can only be displayed in the start position of each address. (Refer toTable 4)
80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
HLHLHLHLHLHLHLHLHLHLHLHLHLHLHLHL
S i t r on i x
ST 7 9 2 0
矽 創 電 子 .. 中 文 編 碼
(正 確)
矽 創 電 子 ... 中 文 編 碼
Table 4
Incorrect start position
www.DataSheet4U.com
V4.0
11/49
2008/08/18
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ST7920.PDF ] | |
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