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: 工作電壓 2.4V-5.5V ，需要外掛㆒個固定電阻和電容，其頻率為 56.875KHZ 或 RC 振盪器（always on） 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 z z VCD 面板控制器 DVD 面板控制器 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 I/O I I O I O O I I I P O P P I Description 鍵盤輸入腳（active high） Resonator 振盪線路腳 Resonator 振盪線路腳 RC oscilallator 振盪線路腳 LCD segment output pin LCD common output pin 串接輸入控制腳，low active，有 pull high 電阻 140Kohm@5V 串接輸入控制腳，low active，有 pull high 電阻 140Kohm@5V 串接輸入資料腳，有 pull high 電阻 140Kohm@5V Ground pin 資料輸出腳 Power pin LCD power pin 資料碼設定腳（pull low 280Kohm@5V） C8-C1 AIN R4-R3 I/O Column control for keyboard matrix I 客戶碼設定腳 I 鍵盤輸入腳（active high, pull low 200Kohm@5V） Total Pin pins 2 1 1 1 19 4 1 1 1 1 1 1 1 1 8 1 2 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 Email: [email protected] 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 4 5 6 13 NO. NAME X 1 R2 -710 2 R1 3 25 Y NO. NAME X Y 650 17 SEG7 -230 -710 517.5 18 SEG6 XI -710 402.5 19 4 XO -462.2 287.5 5 ROSC -710 6 SEG18 7 RLCD-C NO. NAME X Y -650 33 DOUT 710 287.5 -115 -650 34 VDD 710 402.5 SEG5 0 -650 35 VLCD 710 517.5 20 SEG4 115 -650 36 D7 710 650 287.5 21 SEG3 230 -650 37 C8 575 650 -710 172.5 22 SEG2 345 -650 38 C7 460 650 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 * 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: [email protected] 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 ITEM Operating Temperature Storage Temperature Supply Voltage Voltage to input terminal 2 RATING -20℃- +70℃ -50℃- +125℃ 5.5 Vss-0.3 to Vdd+0.3 UNIT ℃ ℃ V V D.C. Characteristics Symbol 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 3 SYMBOL Top Tsto VDD Vin Condition min. typ. Max. unit 2.4 5 400 5.5 800 V uA 0 0.3VDD V VIH1 0.7VDD VDD V VST 2.7 V VSU 2.4 V VDD IOPR System clock at 56.875Khz RC oscillator, LCD on, no load, @5V VIL1 IIROH IIROL VDD＝5V, VOH=4.5V VDD＝5V, VOL=0.5V 6 6 Condition RC oscillator @5v 1/4 duty ＠5V，Clock duty 50% @5V min. 12 12 mA mA A.C. Characteristics Item Symbol System clock fSYS LCD frame frequency FLCD FCKWB 串行控制 CKWB 串行控制 SYNCB tSYNCB (Reset pulse width of high state) typ. Max. 56.875 55.5 500 100 unit KHz HZ KHz ns * 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: [email protected] 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 LCD DRIVER Serial Interface Control Circuit RC Oscillator DATA OUT CODE SETTING BIAS CIRCUIT 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: [email protected] 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 控制格式表 控制碼 功能 前置碼 Mode Code 指令 寫入 1 1 00 010 功能 控制碼 0-C7C6C5C4--C3C2C1C0 0-0010—0001 位址碼 資料碼 0-C7C6C5C4--C3C2C1C0 A4A3A2A1A0 B0B1B2B3 功能描述 Initial State V RC 振盪器不給 LCD driver 用＆ LCD 偏 壓電路 OFF 0-0010—0011 x RC 振盪器提供給 LCD driver 用 0-0010—0101 V 液晶顯 LCD 偏壓電路 OFF 示控制 0-0010—0111 x LCD 偏壓電路 ON 系統控制』碼只是控制內部 Note: 此 IC 的 Oscillator 是㆒直振盪的，以㆖『系統控制 clock 要不要供 系統控制 給 LCD driver 的線路使用。 系統控 制 2 LCD RAM 位置 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: [email protected] 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 串列控制格式 A. 寫入格式 功能 寫入 前置碼 1 Mode Code 010 位址碼 A4A3A2A1A0 資料碼 B0B1B2B3 分段寫入： 1 0 10 A4A3A2A1A0 B0B1B2B3 0 10 A4A3A2A1A0 B0B1B2B3 1 010 A4A3A2A1A0 B0.. 連續寫入： 1 B0B1B2B3 B0B1B2B3 B0B1B2B3 B. 控制格式 Mode Code 功能 前置碼 指令 1 控制碼 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: [email protected] 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) 分段控制格式： 1 00 0-C7C6C5C4-C3C2C1C0 1 00 0-C7C6C5C4-C3C2C1C0 0-C7C6C5C4-C3C2C1C0 0-C7C6C5C40-C3C2C1C0 連續控制格式： 1 00 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: [email protected] 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 : R1 R2 R3 R4 5 C1 C2 C3 C4 C5 C6 C7 C8 K11 K21 K31 K41 K12 K22 K32 K42 K13 K23 K33 K43 K14 K15 K25 K35 K45 K16 K26 K36 K46 K17 K27 K37 K47 K18 K28 K38 K48 K24 K34 K44 Transmission code A. 同 CM2221，但是沒有 38Khz carrier 的 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: [email protected] 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: [email protected] 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 option，and 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 ROM1。The A8 - - A15 equal some bits be inverted of A0 - - A7，the inversion are decided by logical OR between the switches (S8 - - S15) and ROM2。 For example : CM2915-1 AIN C2 C1 200K 200K S8 S9 S0 1N4148 C6 C5 200K 200K 200K 200K S10 S11 S12 S13 S1 1N4148 C4 C3 S3 S2 1N4148 1N4148 1N4148 1 : Switch close 200K 200K S15 S14 S5 S4 C8 C7 S7 S6 1N4148 1N4148 1N4148 0 : Switch open RLCD-4 External switch S0 - - - S15 : → S0 - - S7 0 1 0 1 0 1 0 0 S8 - - S15 1 1 0 0 0 1 0 0 On chip ROM1，ROM2 : → ROM1 0 0 0 0 0 0 0 0 ROM2 0 0 0 0 0 0 0 0 A0 - - A7 : → (S0 - - S7) OR ROM1 0 1 0 1 0 1 0 0 (S8 - - S15) OR ROM2 1 1 0 0 0 1 0 0 x x ↓ ↓ ↓ x ↓ ↓ A8’ - - A15’ : → 1 : non-inversion 0 : inversion A8 - - A15 : → Custom codes A0 - - - A15 : → A0 A1 - - - - A5 - A2B A3B A4B - - - A6B A7B 0 1 1 0 1 1 1 1 A0 - - A7 0 1 0 1 0 1 0 0 A8 - - A15 0 1 1 0 1 1 1 1 * 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: [email protected] 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 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 option table A0 A1 A2 S0 = 1 0 0 0 S1 = 1 1 0 0 S2 = 1 0 1 0 S3 = 1 1 1 0 S4 = 1 0 0 1 S5 = 1 1 0 1 S6 = 1 0 1 1 S7 = 1 1 1 1 S14 S15 0 0 0 1 1 0 1 1 ROM3 option table A3 A4 A5 A6 A7 0 0 0 0 0 1 1 0 0 1 0 0 0 0 1 1 0 1 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: [email protected] 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 : CM2915-2 AIN C2 C1 200K 200K S8 S9 S0 1N4148 C6 C5 200K 200K 200K 200K S10 S11 S12 S13 S1 1N4148 C4 C3 S3 S2 1N4148 1N4148 1N4148 1 : Switch close External switch S0 - - - S15 : → S15 S7 S6 1N4148 1N4148 0 : Switch open S0 - - S7 0 0 0 0 0 0 1 0 RLCD-5 S8 - - S15 0 1 0 1 0 0 1 0 ROM2 0 0 0 0 0 0 0 0 S0 - -S7 S14，S15 0 1 1 0 0 0 0 1 (S8 - - S13) OR ROM2 0 1 0 1 0 0 x x ↓ x ↓ x ↓ ↓ ↓ ↓ A8’ - - A15’ : → 1 : non-inversion 0 : inversion A8 - - A15 : → Custom codes A0 - - - A15 : → 200K S14 1N4148 On chip ROM2 : → A0 - - A2，A3 - - A7 : → 200K S5 S4 C8 C7 A1B A1 - A2B A3 - - - - - A4B A5B A6B A7B 1 1 0 0 1 1 1 0 A0 - - A7 0 1 1 0 0 0 0 1 A8 - - A15 1 1 0 0 1 1 1 0 * 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: [email protected] 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 keys。Each 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 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 1 0 0 0 1 1 0 1 0 0 0 0 0 1 1 0 0 0 1 0 1 1 0 0 0 0 1 1 1 0 0 0 1 1 1 1 0 0 0 1 0 1 0 1 1 0 0 1 1 0 1 1 0 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 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 1 0 1 0 0 0 1 1 0 1 0 0 1 1 1 0 1 0 0 0 0 0 1 1 0 0 1 0 0 1 1 0 0 0 1 0 1 1 0 0 1 1 0 1 1 0 0 0 0 1 1 1 0 0 1 0 1 1 1 0 0 0 1 1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 0 1 1 0 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 circuit。As regards the key transmission priority in the case of two depressions，with simultaneous depressions ( ± 36 ms ) transmission is disabled and first depressions，later remainder priority is used。 When a key is pressed，reading of the custom code and key data code is started，and IRO output begins 36 ms later，so that if the key is begin depressed during this 36 ms interval one transmission is performed。If a key is held down for 108 ms or longer，consecutive transmissions of the leader code only are performed while the key is depressed。As 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: [email protected] 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 K16 Enables Kmn input Kmn Enables 36 ms 36ms < t < 126 ms K16 code transmission DOUT 36 ms 108 ms ( min. ) (A) K16 input Kmn input K16 Enables Kmn Enables t < 36 ms DOUT The transmission is disabled. (B) Kmn input Kmn Enables K16 input K16 Enables 36 ms 36ms < t < 126 ms Kmn code transmission DOUT 36 ms 108 ms ( min. ) (C) Page 8/10 Kmn input Kmn Enables K16 input K16 Enables t < 36 ms 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: [email protected] 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 Kmn code transmission DOUT 36 ms 108 ms ( min. ) (E) Kmn input Kmn Enables t > 108 ms Kmn code transmission DOUT 36 ms 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+K26，K16+K36，K16+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 K16 Enables Kd6 input Kd6 Enables 36 ms t > 126 ms K16 code transmission DOUT K16+Kd6 code transmission 36 ms 108 ms 108 ms The algorithm rule of the custom codes ( A0 - - - A15 ) can be selected by mask option，and 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: [email protected] 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 要調整 ROSC 的頻率時，請量測 Frame 要為 55.5Hz，至於其生產可容許的誤差範圍，要 以接收器（FLASH ROM）所能辨認的最大頻率範圍來生產。 * 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: [email protected] 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 COM 0 -- COM3 SEG0 - SEG18 ROSC C1 C2 XI C3 C4 SYNCB C5 C6 CKWB C7 C8 DI VLCD 30K 1000pF Px Px Px MCU Px IR rcv. VDD DOUT 0.1u GND GND D7 200Kohm 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: [email protected] 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 COM 0 -- COM3 SEG0 - SEG18 XO C1 C2 XI C3 C4 SYNCB C5 C6 CKWB C7 C8 DI VLCD 100p 455Khz 100p Px Px Px MCU IR rcv. Px VDD DOUT 0.1u GND GND D7 100 -200 Kohm R1 R2 R3 R4 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: [email protected] 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） ） VLCD COM 0 -- COM3 SEG0 - SEG18 30K ROSC 1000pF C1 C2 C3 C4 C5 C6 C7 C8 XI MCU Px SYNCB Px CKWB Px DI VDD R1 R2 R3 R4 0.1u GND GND DOUT D7 AIN RLCD-32 * 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: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 19 of 19 Rev 1.0 Aug.1, 2003 Fax:886-3-3521052