Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 LCD Driver for 160 Display Units BL55087 The BL55087 is a general COG LCD driver IC for 160 units LCD panel. It features a wide operating supply voltage range, incorporates simple communication interface with microcomputer and is suitable for multiple application. 1． 1．Features ● ● ● ● ● ● ● ● ● ● ● ● Advanced low power CMOS Technology Selection of 1/2 or 1/3 bias, selection of 1/2 or 1/3 or 1/4 duty. Operation voltage: 2.5~5.5V I2C data interface 160(40x4) Display Units Low power dissipation design: Power saving mode: Idd=14uA at 5V and Idd=9uA at 3.3V; Sleeping mode: Idd<2uA Maybe cascaded up to 2PCs for large LCD applications On-chip RC oscillator VLCD for adjusting LCD operating voltage Excellent EMC immunity Compatible with general microcomputer Package: COG 2．Pin Description Pin No. 1~4 5~44 45,46 47,48 49,50 51 52 Pin name BP0~BP3 S0~S39 NC SDA SCL SYNC CLK 53~57 58 59 60~64 65~69 70 Vdd OSC A0 Vss Vlcd CLK 71 72 73 SYNC SCL SDA BL55087 Version 1.0 Function BP terminal driving output Segment terminal driving output Serial data input/output Serial clock input Cascade synchronization clock External clock input （OSC=0:output；OSC=1:input） Supply voltage internal oscillator enable input Subaddress inputs ground LCD supply voltage External clock input （OSC=0:output；OSC=1:input） Cascade synchronization clock Serial clock input Serial data input/output 1 Shanghai Belling Corp., Ltd BL55087 zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 Dice Size: 4110um*680um Bump Height: 15~20um Chip Thickness: 525um Bump Pitch: 90um(min.) ITEM NUMBER SIZE UNIT X Chip Thickness Pad pitch Bump size All Pad Output pad 1~44 In/out pad 47~52,70~73 Input pad 58， 58，59 Power/GND 53~57， 53~57，60~69 pad NC 45， 45，46 All pad Bump height Y 500um (暂定 (暂定) 暂定) um 90 um um um um um 32 32 32 32 50 50 50 50 32 34 um um 15~20 PIN CONFIGURATION: 32 Bump Size (unit:um) 32 4 3 0 5 pad:45~46 pad:1~44 47~73 44 40 35 30 25 20 15 10 5 s 3 9 s 1 1 s 0 b p 3 C L K S Y N C b p 2 b p 1 b p 0 S C L N S D A y x A _ N G I L A S D A S D A S C L S C L C C N N 46 (-1950,-108) 10um 10um 47 48 49 50 V D D V D D V D D V D D 53 54 55 56 57 O S C A 0 58 59 V S S V S S V S S V S S V S S 60 61 62 63 64 V L C D V L C D V L C D V L C D V L C D 65 66 67 68 69 70 71 72 73 (1950,-108) 8 4 36 mu m u 0 0 11 40um 51 52 V D D 10um 10um 20um 40um 20um C L K 28 unit:um (-1168,-72) 18 BL55087 Version 1.0 20um 40um mu m u 0 0 11 45 S Y N C B _ N G I L A (0,0) 20um 20um 20um 4 8 2 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 Package COG Pad Coordinates SYMBOL PAD COORDINATES X BP0 BP1 BP2 BP3 S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 NC NC SDA SDA SCL SCL SYNC BL55087 Version 1.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 1935 1845 1755 1665 1575 1485 1395 1305 1215 1125 1035 945 855 765 675 585 495 405 315 225 135 45 -45 -135 -225 -315 -405 -495 -585 -675 -765 -855 -945 -1035 -1125 -1215 -1305 -1395 -1485 -1575 -1665 -1755 -1845 -1935 -1952.53 -1862.53 -1145.93 -1055.93 -965.93 -875.93 -785.93 3 Y 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 224.62 -202.17 -202.17 -194.17 -194.17 -194.17 -194.17 -194.17 BL55087 CLK VDD VDD VDD VDD VDD OSC A0 VSS VSS VSS VSS VSS VLCD VLCD VLCD VLCD VLCD CLK SYNC SCL SDA Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 -695.93 -425.93 -335.93 -245.93 -155.93 -65.93 114.07 204.07 384.07 474.07 564.07 654.07 744.07 924.07 1014.07 1104.07 1194.07 1284.07 1554.07 1644.07 1824.07 1914.07 Alignment Marks ITEM ALIGN A SIZE (-1950,-108) 10um 10um 20um 40um mm uu 00 11 20um ALIGN B 40um (1950,-108) 10um 10um 20um 40um mm uu 0 01 1 20um 20um 20um Note Alignment marksare on metal2， metal2，under passi ation. BL55087 Version 1.0 4 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 -194.17 BL55087 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 3．BLOCK DIAGRAM 4．Function Description 1. function circuit The BL55087 has all function circuits that can directly drive any static or multiplexed LCD containing up to four commons and up to 40 segments. The function circuits include:Power-on reset, LCD bias generator, LCD voltage selector, Oscillator, display RAM, Timing, Display latch, Shift register, Common/segment outputs, input/output bank selector, Blinker, Data pointer, Subaddress counter,etc. 2. display function description The display RAM is a static 40x 4-bit RAM which stores LCD data. A logic 1 in the RAM bit-map indicates the on state of the corresponding LCD segment; similarly, a logic 0 indicates the off state. There is a one-to-one correspondence between the RAM addresses and the segment outputs, and between the individual bits of a RAM word and the common outputs. (see Fig.2). BL55087 Version 1.0 5 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 Display RAM address and SEGMENT（ （S0~S39） ）output 0 COM (Com0~ Com3) 1 2 3 36 37 38 39 0 1 2 3 Fig2 When display data is transmitted to the BL55087, the display bytes received are stored in the display RAM in accordance with the selected LCD drive mode. To illustrate the filling order, an example of a 7-segment numeric display showing all drive modes is given in Fig.3; the RAM filling organization depicted applies equally to other LCD types. Fig 3 I2C-bus protocol Two I2C-bus slave addresses (0111000) are reserved for the BL55087. The least significant bit of the slave address that a BL55087 will respond to is defined by the level tied at its input SA0. Therefore, two types of BL55087 can be distinguished on the same I2C-bus which allows: 1. Up to 2 BL55087 on the same I2C-bus for very large LCD applications. 2. The use of two types of LCD multiplex on the same I2C-bus. 3. BL55087 Version 1.0 6 Shanghai Belling Corp., Ltd BL55087 zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 The I2C-bus protocol is shown in Fig.4. The sequence is initiated with a START condition (S) from the I2C-bus master which is followed by one of the two BL55087 slave addresses available. Two BL55087s with the corresponding SA0 level acknowledge in parallel with the slave address but two BL55087s with the alternative SA0 level ignore the whole I2C-bus transfer. After acknowledgement, one or more command bytes (m) follow which define the status of the addressed BL55087s. The last command byte is tagged with a cleared most significant bit, the continuation bit C. The command bytes are also acknowledged by all addressed BL55087s on the bus. After the last command byte, a series of display data bytes(n) may follow. These display bytes are stored in the display RAM at the address specified by the data pointer and the subaddress counter. Both data pointer and subaddress counter are automatically updated and the data is directed to the intended BL55087 device. The acknowledgement after each byte is made only by the A0 addressed BL55087. After the last display byte, the I2C-bus master issues a STOP condition (P). Fig 4 4. command decoder The command decoder identifies command bytes that arrive on the I2C-bus. All available commands carry a continuation bit C in their most significant bit position. The five commands available to the BL55077 are defined in Fig 5. BL55087 Version 1.0 7 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 Fig 5 Note 1 2 In power-saving mode， ，the frequency of SCL must be less than 20kHz At the bias of 1/3，Vdd – Vlcd must be more than 2.9V Absolute Maximum Rating Parameter Symbol Rating Unit Supply voltage LCD operating voltage Input voltage Output voltage Vdd,Vss,Vlcd current Maximum power consumption Operating temperature Storage temperature Vdd Vlcd Vi Vo Idd,Iss,Ilcd Ptot Topr Tstg -0.5 +6.0 0 Vdd Vss-0.5 Vdd+0.5 Vlcd-0.5 Vdd+0.5 -50 +50 400 -40 +75 -65 +150 V V V V mA mW o C o C Tab 6 BL55087 Version 1.0 8 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 DC Characteristic Symbol Parameter Min Typ Max Unit Test Condition Vdd Idd1 IC Operating voltage LCD operating voltage Supply current Idd2 Supply current Idd3 Supply current Idd4 Supply current Vlcd ISL Vdd 5V,VLCD 0V,Normal mode,internal oscillator Vdd 5V,VLCD 0V,power sa ing mode,internal oscillator Vdd 3.3V,VLCD 0V,Normal mode,internal oscillator Vdd 3.3V,VLCD 0V,power sa ing mode,internal oscillator Sleep current Vdd=5V,VLCD=0V 2.5 - 5.5 V 0 - Vdd-2 V - 25 50 uA - 14 30 uA - 16 30 uA - 9 15 uA - 1.5 2 uA ViL Low voltage input SDA,SCL Vss - 0.3Vdd V ViH High voltage input Pull high resister SDA,SCL 0.7Vdd - 6.0 V 30 60 100 Rph SYNC k Tab 7 Ta=25oC AC Characteristic Symbol Parameter Min Typ Max Unit 125 21 1 5 5 4 180 31 - 300 48 3 - KHz KHz us us us us 250 - - ns Test Condition Fclk Fclklp Tclkh/L Tsh Tlow Thigh Oscillator frequency Oscillator frequency CLK time Set-up delay time SCL LOW time SCL HIGH time Thd Pulse delay time Vdd=5V,normal mode Vdd=3.3V, power saving mode Tab 8 5． COG Package Chip ( ace down) Bump CTO Glass BL55087 Version 1.0 9 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 BL55087 Small glass chip LCD segments and backplanes Big glass 6. timing wa e orms Fig 6 7. Typical Application Circuit Note:1/ when I2C are idle mode,SDA and SCL must be connect to high level(by pull up resistor),otherwise the device maybe can not go into power saving mode. 1/ single application LCD PANEL S 3 9 B P 3 S 0 S D A S C L MCU S Y N C C L K V D D VDD CLK (optional) O S C A 0 V S S V C L D VSS VCLD C L K B P 0 S Y N C S D A N Typical system con iguration BL55087 Version 1.0 S C L 10 Shanghai Belling Corp., Ltd BL55087 zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 application 2/ cascade app lication LCD PANEL opencircuit S 3 9 S D A B P 3 S 0 S C L S Y N C C L K V D D O S C V D D MCU CLK (optional) A 0 V S S V C L D V S S V C L D C L K B P 0 S Y N C S C L S D A S 3 9 S D A B P 3 S 0 S C L S Y N C C L K V D D V D D O S C A 0 V S S V S S V C L D C L K B P 0 S Y N C S C L S D A V C L D Cascaded con iguration N BL55087 Version 1.0 11