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CM2915
LCD Driver (19*4) with Key Scan (4*8)
. General Description:
IC VCD/DVD LCD CM2221 LCD driver CM2221
. Features:
2.4V-5.5V 56.875KHZ RC always on 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 R2-R1 XI XO ROSC SEG18-0 COM3-COM0 SYNCB CKWB DI GND DOUT VDD VLCD D7 C8-C1 AIN R4-R3 I/O I I O I O O I I I P O P P I Description active high Resonator Resonator RC oscilallator LCD segment output pin LCD common output pin low active pull high 140Kohm@5V low active pull high 140Kohm@5V pull high 140Kohm@5V Ground pin Power pin LCD power pin pull low 280Kohm@5V pins 2 1 1 1 19 4 1 1 1 1 1 1 1 1 8 1 2 47
I/O Column control for keyboard matrix I I active high, pull low 200Kohm@5V Total Pin
* 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 Page 1 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
. Pin Assignment
1 47 36
3 5 6 4
13
25
RLCD-C
X 710 710 710 710 575 460 345 230 115 0 -115 -230 -345 -460 -575 Y 287.5 402.5 517.5 650 650 650 650 650 650 650 650 650 650 650 650
NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
NAME R2 R1 XI XO ROSC SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8
X -710 -710 -710 -462.2 -710 -710 -710 -710 -710 -710 -710 -710 -710 -575 -460 -345
Y 650 517.5 402.5 287.5 287.5 172.5 57.5 -57.5 -172.5 -287.5 -402.5 -517.5 -650 -650 -650 -650
NO. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
NAME SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 COM3 COM2 COM1 COM0 SYNCB CKWB DI VSS
X -230 -115 0 115 230 345 460 575 710 710 710 710 710 710 710 710
Y -650 -650 -650 -650 -650 -650 -650 -650 -650 -517.5 -402.5 -287.5 -172.5 -57.5 57.5 172.5
NO. 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
NAME DOUT VDD VLCD D7 C8 C7 C6 C5 C4 C3 C2 C1 AIN R4 R3
Chip size : 1540*1650um
* 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 Page 2 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
. AC / DC Characteristics
1 Absolutely max. ratings
SYMBOL Top Tsto VDD Vin RATING -20- +70 -50- +125 5.5 Vss-0.3 to Vdd+0.3 UNIT V V ITEM Operating Temperature Storage Temperature Supply Voltage Voltage to input terminal
2
D.C. Characteristics
Symbol Condition min. 2.4 typ. 5 400 Max. 5.5 800 0.3VDD VDD unit V uA V V V V 12 12 mA mA VDD IOPR System clock at 56.875Khz RC oscillator, LCD on, no load, @5V VIL1 VIH1 VST VSU IIROH IIROL VDD5V, VOH=4.5V VDD5V, VOL=0.5V
Item Operating voltage Power consumption current Input low voltage for input pin Input high voltage for input pin RC oscillator start-up voltage RC oscillator sustain voltage DOUT source current DOUT sink current
0 0.7VDD 2.7 2.4 6 6
3
A.C. Characteristics
Condition RC oscillator @5v 1/4 duty 5VClock duty 50% @5V min. typ. Max. 56.875 55.5 500 100 unit KHz HZ KHz ns
Item Symbol System clock fSYS LCD frame frequency FLCD FCKWB CKWB SYNCB tSYNCB (Reset pulse width of high state)
* 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 Page 3 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
. Block Diagram
LCD RAM Serial Interface Control Circuit RC Oscillator
LCD DRIVER
BIAS CIRCUIT
DATA OUT
CODE SETTING
KEY SCAN
RLCD-2
* 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 Page 4 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
. Function Description
1 LCD
1 1 Mode Code 00 010 0-C7C6C5C4--C3C2C1C0 A4A3A2A1A0 B0B1B2B3 Initial State V
RC LCD driver LCD OFF 0-0010--0011 x RC LCD driver 0-0010--0101 V LCD OFF 0-0010--0111 x LCD ON clock Note: IC Oscillator LCD driver
0-C7C6C5C4--C3C2C1C0 0-0010--0001
2
LCD RAM
A4A3A2 COM3 COM2 COM1 COM0 A4A3A2 COM3 COM2 COM1 COM0 A1A0 A1A0 Bit3 Bit2 Bit1 Bit0 Bit3 Bit2 Bit1 Bit0 00H SEG0 10H SEG9 01H 11H 02H SEG1 12H SEG10 03H 13H 04H SEG2 14H SEG11 05H 15H 06H SEG3 16H SEG12 07H 17H 08H SEG4. 18H SEG13. 09H 19H 0AH SEG5 1AH SEG14 0BH 1BH 0CH SEG6 1CH SEG15 0DH 1DH SEG16 0EH SEG7 1EH SEG17 0FH SEG8 1FH SEG18
* 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 Page 5 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
3 LCD A.
1 Mode Code 010 A4A3A2A1A0 B0B1B2B3
1
0 10
A4A3A2A1A0
B0B1B2B3
1
010
A4A3A2A1A0
B0..
1
0 10
A4A3A2A1A0
B0B1B2B3
B0B1B2B3
B0B1B2B3
B0B1B2B3
B.
Mode Code 1 00 0-C7C6C5C4--C3C2C1C0
* 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 Page 6 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
1
00
0-C7C6C5C4-C3C2C1C0
1
00
0-C7C6C5C4-C3C2C1C0
1
00
0-C7C6C5C4-C3C2C1C0
0-C7C6C5C40-C3C2C1C0
0-C7C6C5....
* 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 Page 7 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
4 The keyboard form :
C1 R1 R2 R3 R4 K11 K21 K31 K41 C2 K12 K22 K32 K42 C3 K13 K23 K33 K43 C4 K14 K24 K34 K44 C5 K15 K25 K35 K45 C6 K16 K26 K36 K46 C7 K17 K27 K37 K47 C8 K18 K28 K38 K48
5
Transmission code
A. CM2221 38Khz carrier Data Data only
* 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 Page 8 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
B. Pulse Position Modulation
The transmission codes employ the PPM ( Pulse Position Modulation ) method to represent their two logic states by bit-0 ( 1.12 ms ) and bit-1 ( 2.24 ms ) :
* 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 Page 9 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
6 To set the custom codes ( A0 - - - A15 )
The algorithm rule of the custom codes ( A0 - - - A15 ) can be selected by mask optionand the user can choose the CM2915-1 or CM2915-2
A.
The CM2915-1 custom code
The value of ROM1 (8 bits) & ROM2 (8 bits) are both " 00H "and it is decided by one mask layer The A0 - - A7 are set by logical OR between the switches (S0 - - S7) and ROM1The A8 - - A15 equal some bits be inverted of A0 - - A7the inversion are decided by logical OR between the switches (S8 - - S15) and ROM2 For example :
AIN C1
200K 200K
CM2915-1
C2 C3
200K 200K
C4
200K
C5
200K
C6
200K
C7
200K
C8
S8 S0
1N4148
S9 S1
1N4148
S10 S2
1N4148
S11 S3
1N4148
S12 S4
1N4148
S13 S5
1N4148
S14 S6
1N4148
S15 S7
1N4148
1 : Switch close
External switch S0 - - - S15 : On chip ROM1ROM2 :
0 : Switch open
RLCD-4
S0 - - S7 01010100 ROM1 00000000 (S0 - - S7) OR ROM1 01010100
S8 - - S15 11000100 ROM2 00000000
A0 - - A7 : A8' - - A15' :
(S8 - - S15) OR ROM2 11000100 xxx 1 : non-inversion 0 : inversion
A0 A1 - A5 - A2B A3B A4B - A6B A7B
A8 - - A15 : Custom codes A0 - - - A15 : A0 - - A7 01010100
01101111 A8 - - A15 01101111
* 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 Page 10 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
B. The CM2915-2 custom code
In this casethe 28 bits on chip MASK ROM ( ROM2 & ROM3-0ROM3-1ROM3-2 and ROM3-3 ) is available and it is decided by one mask layerThe 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 option table A0 A1 A2 S0 = 1 000 S1 = 1 100 S2 = 1 010 S3 = 1 110 S4 = 1 001 S5 = 1 101 S6 = 1 011 S7 = 1 111 ROM3 option table A3 A4 A5 A6 A7 00 0 00 11 0 01 00 0 01 10 1 11
S14 S15 0 0 0 1 1 0 1 1
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 Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 11 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
For example :
AIN C1
200K 200K
CM2915-2
C2 C3
200K 200K
C4
200K
C5
200K
C6
200K
C7
200K
C8
S8 S0
1N4148
S9 S1
1N4148
S10 S2
1N4148
S11 S3
1N4148
S12 S4
1N4148
S13 S5
1N4148
S14 S6
1N4148
S15 S7
1N4148
1 : Switch close
External switch S0 - - - S15 : On chip ROM2 :
0 : Switch open
RLCD-5
S0 - - S7 00000010
S8 - - S15 01010010 ROM2 00000000
A0 - - A2A3 - - A7 :
S0 - -S7 S14S15 01100001 (S8 - - S13) OR ROM2 010100xx xx 1 : non-inversion 0 : inversion
A1B A1 - A2B A3 - A4B A5B A6B A7B
A8' - - A15' :
A8 - - A15 : Custom codes A0 - - - A15 : A0 - - A7 01100001
11001110 A8 - - A15 11001110
* 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 Page 12 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
The vaules of the data codes ( D0 - - D7 )
The CM2915 contains 32 function keysEach key corresponds to one data code The CM2915 provide 3 double keys
C. The CM2915 data codes :
KEY NAME K11 K21 K31 K41 K12 K22 K32 K42 K13 K23 K33 K43 K14 K24 K34 K44 K16+K26 K16+K36 DATA CODES D0 - - - - - - - - - - D6 0000000 1000000 0100000 1100000 0010000 1010000 0110000 1110000 0001000 1001000 0101000 1101000 0011000 1011000 0111000 1111000 1010110 0110110 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 KEY NAME K15 K25 K35 K45 K16 K26 K36 K46 K17 K27 K37 K47 K18 K28 K38 K48 K16+K46 DATA CODES D0 - - - - - - - - - - D6 0000100 1000100 0100100 1100100 0010100 1010100 0110100 1110100 0001100 1001100 0101100 1101100 0011100 1011100 0111100 1111100 1110110 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
The 8-bit data codes of will define the inverse codes of the other 8-bit data codes ( D8 - - D15 ) D7 is defined by an external switch. - Code D7=0 -> connect to vdd. - Code D7=1 -> connect to vss.
7
Function Keys control
If two or more keys are depressed simultaneously ( except K16+K26 & K16+K36 & K16+K46 ) the transmission is disabled by the multi-depression prevention circuitAs regards the key transmission priority in the case of two depressionswith simultaneous depressions ( 36 ms ) transmission is disabled and first depressionslater remainder priority is used When a key is pressedreading of the custom code and key data code is startedand IRO output begins 36 ms laterso that if the key is begin depressed during this 36 ms interval one transmission is performedIf a key is held down for 108 ms or longerconsecutive transmissions of the leader code only are performed while the key is depressedAs a key interruption operation can handle an interval of up to 126 ms ( from ON to ON ) It is possible to configure a system with an extremely fast response time
* 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 Page 13 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
A. Two or more keys are depressed ( except K16+K26 & K16+K36 & K16+K46 )
K16 input Kmn input
36 ms 36ms < t < 126 ms
K16 Enables Kmn Enables
DOUT
36 ms
K16 code transmission
108 ms ( min. )
(A)
K16 input Kmn input DOUT
t < 36 ms
K16 Enables Kmn Enables
The transmission is disabled.
(B)
Kmn input K16 input
36 ms 36ms < t < 126 ms
Kmn Enables K16 Enables
DOUT
36 ms
Kmn code transmission
108 ms ( min. )
(C) Page 8/10
Kmn input K16 input
t < 36 ms
Kmn Enables K16 Enables
DOUT
The transmission is disabled.
(D)
* 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 Page 14 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
Kmn input
Kmn Enables
t < 108 ms
DOUT
36 ms
Kmn code transmission
108 ms ( min. )
(E)
Kmn input
Kmn Enables
t > 108 ms
DOUT
36 ms
Kmn code transmission
108 ms ( min. ) 108 ms ( min. )
(F) To avoid the mistakes made by keyboard scanning or simultaneous two-key input excep 3 double key active function (K16+K26K16+K36K16+K46) the CM2915 is facilitated with 36 ms starting time
B. The 3 double keys are depressed ( K16+K26 & K16+K36 & K16+K46 )
Kd6 : one of ( K26 or K36 or K46 )
K16 input Kd6 input
36 ms t > 126 ms
K16 Enables Kd6 Enables
DOUT
36 ms
K16 code transmission K16+Kd6 code transmission
108 ms 108 ms
The algorithm rule of the custom codes ( A0 - - - A15 ) can be selected by mask optionand the user can choose the CM2915-1 or CM2915-2
* 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 Page 15 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
8 LCD pattern
ROSC Frame 55.5Hz FLASH ROM
* 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 Page 16 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
9 Application circuit
For RC oscillator use
4.3K 30K 1000pF
Px Px Px
MCU
COM 0 -- COM3 SEG0 - SEG18 ROSC C1 C2 XI C3 C4 SYNCB C5 C6 CKWB C7 C8 DI VLCD VDD DOUT
0.1u
200Kohm
Px
IR rcv.
GND GND D7
R1 R2 R3 R4
AIN
RLCD-3
* 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 Page 17 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
For Resonator oscillator use
4.3K 100p
455Khz
100p
Px Px Px
MCU
COM 0 -- COM3 SEG0 - SEG18 XO C1 C2 XI C3 C4 SYNCB C5 C6 CKWB C7 C8 DI VLCD VDD DOUT R1 R2 R3 R4
100 -200 Kohm
IR rcv.
0.1u
Px
GND GND D7
AIN
RLCD-31
* 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 Page 18 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052
CM2915
LCD Driver (19*4) with Key Scan (4*8)
For LCD driver use
30K 1000pF
VLCD COM 0 -- COM3 SEG0 - SEG18 ROSC C1 C2 C3 C4 C5 C6 C7 C8 R1 R2 R3 R4 DOUT D7 AIN RLCD-32
XI
Px Px
MCU
SYNCB CKWB DI VDD
0.1u
Px
GND GND
* 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 Page 19 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052

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