Datasheet LCD Segment Drivers Multi-function LCD Segment Drivers BU97550KV-M MAX 528 Segment(66SEG x 8COM) General Description Key Specifications The BU97550KV-M is 1/8, 1/7, 1/5, 1/4, 1/3, or Static Supply Voltage Range: +2.7V to +6.0V general-purpose LCD driver. Operating Temperature Range: -40C to +85C The BU97550KV-M can drive up to 528 LCD Segments Max Segments: 528 Segments directly. The BU97550KV-M can also control up to 9 Display Duty Static, 1/3, 1/4, 1/5, 1/7, 1/8 General-Purpose/PWM output ports. Selectable These products also incorporate a key scan circuit that Bias: 1/2, 1/3, 1/4 Selectable accepts input from up to 30 keys to reduce printed circuit Interface: 3wire Serial Interface board wiring Features Applications (Note) AEC-Q100 Qualified Car Audio, Home Electrical Appliance, Key Input Function for Up to 30 Keys (A key scan is Meter Equipment etc. performed only when a key is pressed.) Either 1/8, 1/7, 1/5, 1/4, 1/3 or Static Can be Selected with The Serial Control Data. Package W (Typ) x D (Typ) x H (Max) 1/8 duty drive: Up to 528 Segments can be driven 1/7 duty drive: Up to 469 Segments can be driven 1/5 duty drive: Up to 345 Segments can be driven 1/4 duty drive: Up to 280 Segments can be driven 1/3 duty drive: Up to 210 Segments can be driven Static drive: Up to 70 Segments can be driven Serial Data Control of Frame Frequency for Common and Segment output Waveforms. Serial Data Control of Switching Between The Segment output Port, PWM output Port and General-Purpose output Port Functions.(Max 9 ports) Built-in Oscillation circuit Integrated Voltage Detected Type Power on VQFP80 Reset(VDET) circuit 14.00mm x 14.00mm x 1.60mm No External Component Low Power Consumption Design Supports Line and Frame Inversion (Note) Grade 3 Typical Application Circuit Key Matrix P1/G1 (General Purpose/PWM Ports) (For control of backlight) P9/G9 KS1 / S53 KI1 / S59 COM1 COM2 KS6 / S58 KI5 / S63 COM3 COM4 VDD COM5/S67 +5V COM6/S66 COM7/S65 (Note2) COM8/S64 LCD Panel (Up to 528 Segments) SCE S1/P1/G1 From Control SCL SDI S9/P9/G9 To Control SDO S10 S52 S68 S69 OSC IN /S70 (Note2) Insert capacitors between VDD and VSS C0.1F Figure 1. Typical Application Circuit Product structure : Silicon monolithic integrated circuit This product is not designed protection against radioactive rays. www.rohm.com TSZ02201-0P4P0D300980-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/72 TSZ22111 14 001 18.Jul.2019 Rev.004 BU97550KV-M MAX 528 Segment(66SEG x 8COM) Block Diagram COMMON Driver SEGMENT Driver/Latch Clock /Timing OSC IN / S70 Control Register PWM Register Generator SCE Shift Register SCL Serial Interface LCD voltage Generator SDI SDO KEY BUFFER VLCD VDD VLCD1 VDET VLCD2 KEY SCAN VLCD3 VSS VSS Figure 2. Block Diagram Pin Arrangement 61 40 KI5 / S63 S42 COM8 / S64 S41 COM7 / S65 S40 COM6 / S66 S39 COM5 / S67 S38 COM4 S37 COM3 S36 COM2 S35 S34 COM1 VDD S33 VSS S32 S31 S68 S30 SDO S69 S29 OSC IN / S70 S28 SCE S27 SCL S26 SDI S25 S1 / P1 / G1 S24 S2 / P2 / G2 S23 80 21 Figure 3. Pin Configuration (TOP VIEW) www.rohm.com TSZ02201-0P4P0D300980-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/72 TSZ22111 15 001 18.Jul.2019 Rev.004 60 S3 / P3 / G3 KI4 / S62 S4 / P4 / G4 KI3 / S61 COM1 S5 / P5 / G5 COM2 KI2 / S60 COM3 S6 / P6 / G6 KI1 / S59 COM4 S7 / P7 / G7 KS6 / S58 S8 / P8 / G8 KS5 / S57 S9 / P9 / G9 KS4 / S56 KS3 / S55 S10 S11 KS2 / S54 S12 KS1 / S53 S67/COM5 S13 S52 S66/COM6 KI5 / S63 S14 S51 KI4 / S62 S65/COM7 S15 S50 KI3 / S61 S65/COM8 S16 S49 KI2 / S60 S17 S48 KI1 / S59 S18 S47 S10 KS6/ S58 S19 S46 KS5/ S57 S9/P9/G9 S20 S45 KS4/ S56 KS3/ S55 S21 S44 KS2/ S54 S22 S43 S1/P1/G1 41 KS1/ S53