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PDF CM2915 Data sheet ( Hoja de datos )
| Número de pieza | CM2915 | |
| Descripción | LCD Driver (19x4) with Key Scan (4x8) | |
| Fabricantes | Ceramate Technical | |
| Logotipo |  |
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CM2915
LCD Driver (19*4) with Key Scan (4*8)
. General Description:
此 IC 是針對 VCD/DVD LCD 面板而設計，CM2221整合 LCD driver 功能，並精簡 CM2221
的應用線路，達到成本降低的目標，希望讓客戶的產品更有競爭力。
. Features:
www.DataSheet4U.com
工作電壓 2.4V-5.5V
RC 振盪器（always on），需要外掛㆒個固定電阻和電容，其頻率為 56.875KHZ 或
是 455KHZ resonator振盪器
可以推動 32 FUNCTION KEY 和 3 個 DOUBLE KEY（64+6 Using D7 pin）
提供簡單串接介面給 LCD 介面使用
液晶驅動 19 SEG/4 COM，1/4 duty，1/3 bias
提供內部 RESET 線路
. Application:
z VCD 面板控制器
z DVD 面板控制器
z 音響面板控制器
. Pin Description
Name
R2-R1
XI
XO
ROSC
SEG18-0
COM3-COM0
SYNCB
CKWB
DI
GND
DOUT
VDD
VLCD
D7
C8-C1
AIN
R4-R3
I/O Description
I 鍵盤輸入腳（active high）
I Resonator 振盪線路腳
O Resonator 振盪線路腳
I RC oscilallator 振盪線路腳
O LCD segment output pin
O LCD common output pin
I 串接輸入控制腳，low active，有 pull high 電阻 140Kohm@5V
I 串接輸入控制腳，low active，有 pull high 電阻 140Kohm@5V
I 串接輸入資料腳，有 pull high 電阻 140Kohm@5V
P Ground pin
O 資料輸出腳
P Power pin
P LCD power pin
I 資料碼設定腳（pull low 280Kohm@5V）
pins
2
1
1
1
19
4
1
1
1
1
1
1
1
1
I/O Column control for keyboard matrix
I 客戶碼設定腳
8
1
I 鍵盤輸入腳（active high, pull low 200Kohm@5V）
2
Total Pin 47
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Fax:886-3-3521052
Page 1 of 19
Email: [email protected]
Http: www.ceramate.com.tw
Rev 1.0 Aug.1, 2003
1 page  
CM2915
LCD Driver (19*4) with Key Scan (4*8)
. Function Description
1 LCD 控制格式表
功能
指令
寫入
前置碼
1
1
Mode Code
00
010
控制碼
位址碼
資料碼
0-C7C6C5C4--C3C2C1C0
A4A3A2A1A0
B0B1B2B3
www.DataSheet4U.c功om能
控制碼
0-C7C6C5C4--C3C2C1C0
功能描述
Initial
State
系統控
0-0010—0001
RC 振盪器不給 LCD driver 用＆ LCD 偏
V
制 壓電路 OFF
0-0010—0011
RC 振盪器提供給 LCD driver 用
x
液晶顯
0-0010—0101
LCD 偏壓電路 OFF
V
示控制
0-0010—0111
LCD 偏壓電路 ON
x
Note: 此 IC 的 Oscillator 是㆒直振盪的，以㆖『系統控制』碼只是控制內部 clock 要不要供
給 LCD driver 的線路使用。
2 LCD RAM 位置
A4A3A2
A1A0
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
0EH
0FH
COM3
Bit3
COM2 COM1
Bit2 Bit1
SEG0
SEG1
SEG2
SEG3
SEG4.
SEG5
SEG6
SEG7
SEG8
COM0
Bit0
A4A3A2
A1A0
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
COM3
Bit3
COM2 COM1
Bit2 Bit1
SEG9
SEG10
SEG11
SEG12
SEG13.
SEG14
SEG15
SEG16
SEG17
SEG18
COM0
Bit0
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Fax:886-3-3521052
Page 5 of 19
Email: [email protected]
Http: www.ceramate.com.tw
Rev 1.0 Aug.1, 2003
5 Page 
CM2915
LCD Driver (19*4) with Key Scan (4*8)
B. The CM2915-2 custom code
In this case，the 28 bits on chip MASK ROM ( ROM2 & ROM3-0，ROM3-1，ROM3-2 and
ROM3-3 ) is available and it is decided by one mask layer。The value of ROM2 is “ 00H “ and the
value of ROM3 is show below “ ROM3 option table “。The A0 - - A2 are set by S0 - - S7 ( “ A0 - - A2
option table “ )。The A3 - - A7 are set by S14 & S15( “ ROM3 option table “ )。The A8 - - A15 equal
some bits be inverted of A0 - - A7 and the inversion are decided by logical OR between the switches
S8 - - S13 and ROM2。
A0 - - A2
ww.DataSheet4U.comS0 = 1
S1 = 1
S2 = 1
S3 = 1
S4 = 1
S5 = 1
S6 = 1
S7 = 1
option table
A0 A1 A2
000
100
010
110
001
101
011
111
S14 S15
00
01
10
11
ROM3 option table
A3 A4 A5 A6 A7
00 0 00
11 0 01
00 0 01
10 1 11
ROM3
ROM3-0
ROM3-1
ROM3-2
ROM3-3
S0 - - S7 are closed must only one.
Note : priority S7 > - - - > S0 ( A0 - - A2 option table )
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Fax:886-3-3521052
Page 11 of 19
Email: [email protected]
Http: www.ceramate.com.tw
Rev 1.0 Aug.1, 2003
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet CM2915.PDF ] | |
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