CM2915
LCD Driver (19*4) with Key Scan (4*8)
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
1 of 19
Rev 1.0 Aug.1, 2003
. General Description:
IC VCD/DVD LCD CM2221 LCD driver CM2221
. Features:
2.4V-5.5V
RC always on
56.875KHZ
455KHZ resonator
32 FUNCTION KEY 3 DOUBLE KEY64+6 Using D7 pin
LCD
19 SEG/4 COM1/4 duty1/3 bias
RESET
. Application:
VCD
DVD
.
Pin Description
Name I/O Description pins
R2-R1 I
active high 2
XI I
Resonator 1
XO O
Resonator 1
ROSC I
RC oscilallator 1
SEG18-0 O
LCD segment output pin 19
COM3-COM0 O
LCD common output pin 4
SYNCB I
low active pull high 140Kohm@5V 1
CKWB I
low active pull high 140Kohm@5V 1
DI I
pull high 140Kohm@5V 1
GND P
Ground pin 1
DOUT O
1
VDD P
Power pin 1
VLCD P
LCD power pin 1
D7 I
pull low 280Kohm@5V 1
C8-C1 I/O Column control for keyboard matrix 8
AIN I
1
R4-R3 I
active high, pull low 200Kohm@5V 2
Total Pin 47
CM2915
LCD Driver (19*4) with Key Scan (4*8)
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
2 of 19
Rev 1.0 Aug.1, 2003
. Pin Assignment
1
47
13 25
36
4
5
3
6
RLCD-C
NO. NAME X Y NO. NAME X Y NO. NAME X Y
1 R2 -710 650
17 SEG7 -230
-650
33
DOUT 710
287.5
2 R1 -710
517.5
18 SEG6 -115
-650
34 VDD 710
402.5
3 XI -710
402.5
19 SEG5 0
-650
35
VLCD 710
517.5
4 XO -462.2
287.5
20 SEG4 115 -650
36 D7 710 650
5 ROSC -710 287.5 21 SEG3 230 -650 37 C8 575 650
6 SEG18 -710 172.5 22 SEG2 345 -650 38 C7 460 650
7 SEG17 -710 57.5 23 SEG1 460 -650 39 C6 345 650
8 SEG16 -710 -57.5 24 SEG0 575 -650 40 C5 230 650
9 SEG15 -710 -172.5 25 COM3 710 -650 41 C4 115 650
10 SEG14 -710 -287.5 26 COM2 710 -517.5 42 C3 0 650
11 SEG13 -710 -402.5 27 COM1 710 -402.5 43 C2 -115 650
12 SEG12 -710 -517.5 28 COM0 710 -287.5 44 C1 -230 650
13 SEG11 -710 -650 29 SYNCB 710 -172.5 45 AIN -345 650
14 SEG10 -575 -650 30 CKWB 710 -57.5 46 R4 -460 650
15 SEG9 -460 -650 31 DI 710 57.5 47 R3 -575 650
16 SEG8 -345 -650 32 VSS 710 172.5
Chip size : 1540*1650um
CM2915
LCD Driver (19*4) with Key Scan (4*8)
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
3 of 19
Rev 1.0 Aug.1, 2003
. AC / DC Characteristics
1 Absolutely max. ratings
ITEM SYMBOL RATING UNIT
Operating Temperature Top -20- +70
Storage Temperature Tsto -50- +125
Supply Voltage VDD 5.5 V
Voltage to input terminal Vin Vss-0.3 to Vdd+0.3 V
2 D.C. Characteristics
Item
Symbol Condition min.
typ.
Max.
unit
Operating voltage VDD 2.4 5 5.5 V
Power consumption
current
I
OPR
System clock at 56.875Khz RC
oscillator, LCD on, no load, @5V
400 800 uA
Input low voltage for
input pin
V
IL1
0
0.3VDD
V
Input high voltage for
input pin
V
IH1
0.7VDD
VDD
V
RC oscillator
start-up voltage
V
ST
2.7
V
RC oscillator
sustain voltage
V
SU
2.4
V
DOUT source current I
IROH
VDD5V, V
OH
=4.5V 6 12 mA
DOUT sink current I
IROL
VDD5V, V
OL
=0.5V 6 12 mA
3 A.C. Characteristics
Item Symbol Condition min.
typ.
Max.
unit
System clock f
SYS
RC oscillator @5v 56.875 KHz
LCD frame frequency F
LCD
1/4 duty
55.5
HZ
CKWB F
CKWB
5VClock duty 50%
500 KHz
SYNCB
(Reset pulse width of
high state)
t
SYNCB
@5V
100
ns
CM2915
LCD Driver (19*4) with Key Scan (4*8)
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
4 of 19
Rev 1.0 Aug.1, 2003
. Block Diagram
RLCD-2
Serial
Interface
Control
Circuit
LCD RAM
LCD
DRIVER
BIAS
CIRCUIT
RC
Oscillator
CODE
SETTING
DATA
OUT
KEY
SCAN
CM2915
LCD Driver (19*4) with Key Scan (4*8)
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
5 of 19
Rev 1.0 Aug.1, 2003
. Function Description
1 LCD
Mode Code
1 00 0-C7C6C5C4--C3C2C1C0
1 010 A4A3A2A1A0
B0B1B2B3
0-C7C6C5C4--C3C2C1C0
Initial
State
0-0010--0001 RC LCD driver LCD
OFF
V
0-0010--0011 RC LCD driver x
0-0010--0101 LCD OFF V
0-0010--0111
LCD ON x
Note: IC Oscillator
clock
LCD driver
2 LCD RAM
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
A4A3A2
A1A0
Bit3 Bit2 Bit1 Bit0
A4A3A2
A1A0
Bit3 Bit2 Bit1 Bit0
00
H
SEG0 10
H
SEG9
01
H
11
H
02
H
SEG1 12
H
SEG10
03
H
13
H
04
H
SEG2 14
H
SEG11
05
H
15
H
06
H
SEG3 16
H
SEG12
07
H
17
H
08
H
SEG4. 18
H
SEG13.
09
H
19
H
0A
H
SEG5 1A
H
SEG14
0B
H
1B
H
0C
H
SEG6 1C
H
SEG15
0D
H
1D
H
SEG16
0E
H
SEG7 1E
H
SEG17
0F
H
SEG8 1F
H
SEG18
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