Datasheet Multifunction LCD Segment Drivers BU9798xxx Series MAX 196 segments (SEG49xCOM4) Features Key Specifications Integrated RAM for display data (DDRAM): Supply Voltage Range: +1.8V to +3.6V 49 x4 bit (Max 196 Segment) LCD drive power supply Range: +3.3V to +5.5V LCD drive output: Operating Temperature Range: -30C to +75C 4 Common output, Max 49 Segment output Max Segments: 196 Segments Integrated 3ch LED driver circuit Display Duty: Static. 1/3, 1/4 selectable Segment/ LED (Max 3port) output mode selectable Bias: Static, 1/3 Segment/ GPO (Max 31port) output mode selectable Integrated regulator for LCD drive: Support PWM generation from ext. or internal clock 3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V selectable (Resolution: 8bit mode/12bit mode selectable) Interface: 3wire serial interface Support standby mode Integrated Power-on-Reset circuit (POR) Packages W (Typ.) x D (Typ.) x H (Max.) Integrated Oscillator circuit No external component Low power consumption design Independent power supply for LCD driving Support Blink function (Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable) Applications Telephone VBGA063W050 FAX 5.00mm x 5.00mm x 0.90mm Portable equipment (POS, ECR, PDA etc.) DSC DVC Car audio Home electrical appliance Meter equipment etc. Typical Application Circuit VQFP64 BU9798KV LED/GPO using case 12.00mm x 12.00mm x 1.60mm LED : 3port GPO : 5port LCD : 164seg VLED *Regarding resistor value Please detect the value according to VLCD input current value. (current MAX = 20mA) SEG48 (LED1) VDD SEG47 (LED2) SEG46 (LED3) Other device BU9798KV SEG45(GPO1) to SEG41(GPO5) 5.0V 3.3V VSS1 SEG0 to SEG40 VSS2 TEST1 CSB SCL SD INHb CLKIN LCD to COM0 COM3 CLKIN External CLK input terminal Input signal from controller If not in use, connect to VSS or open. Figure 1. Typical application circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays. www.rohm.com TSZ02201-0A0A2D300030-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/36 TSZ2211114001 8.Jan.2013 Rev.002DatasheetDatasheet BU9798xxx Series MAX 196 segments (SEG49xCOM4) Block Diagrams / Pin Configurations / Pin Descriptions BU9798KV COM0COM3 SEG0 SEG48 VSS2 VLCD LCD voltage common Segment Segment Segment Generator driver driver driver/GPO driver/LED 49 32 Ref Voltage SEG36 SEG19 Circuit SEG37 SEG18 Vreg GPO/LED SEG38 SEG17 Controller LCD BIAS SEG39 SEG16 SELECTOR SEG40 SEG15 common blink timing SEG41 SEG14 DDRAM counter generator PWM GPO data latch SEG42 SEG13 Generator SEG43 SEG12 SEG44 SEG11 SEG45 SEG10 VSS SEG46 SEG9 SEG47 SEG8 INHb Command register SEG48 SEG7 Data Decoder VSS2 SEG6 CLKIN OSCILLATOR Power On Reset PWMOUT SEG5 serial inter face CLKIN SEG4 64 17 Output VDD Controller IF FILTER VSS TEST1 CSB SD SCL PWMOUT Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Terminal Terminal I/O unused case Function number CSB 1 I - Chip select: active SCL 2 I - Serial data transfer clock SD 3 I - Input serial data VDD 4 - - Power supply for LOGIC External clock input terminal (for display/PWM using selectable) CLKIN 64 I OPEN / VSS Support Hi-Z input mode at internal clock mode TEST1 5 I - TEST terminal (Please connect VSS terminal) VSS1 6 - - GND VLCD 8 - - Power supply for LCD Display turning on/off select terminal H: turning on display, L: turning off display INHb 7 I VDD INHb = L: All SEG/COM terminals : output VSS level GPO terminal : output VSS level LED drive terminal : output Hi-Z PWMOUT 63 O OPEN PWM output for LED2 group COM0 to 3 9 to 12 O OPEN COMMON output for LCD SEG0 to 14 13 to 27 O OPEN SEGMENT output for LCD SEG15 to 45 28 to 58 O OPEN SEGMENT output for LCD/GPO SEG46 to 48 59 to 61 O OPEN SEGMENT output for LCD/LED driver VSS2 62 - GND GND (for SEG46-48 / LED driver) www.rohm.com TSZ02201-0A0A2D300030-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/36 TSZ2211115001 8.Jan.2013 Rev.002 11 1166 48 CSB SEG35 SCL SEG34 SD SEG33 VDD SEG32 TEST1 SEG31 VSS1 SEG30 INHb SEG29 VLCD SEG28 COM0 SEG27 COM1 SEG26 COM2 SEG25 COM3 SEG24 SEG0 SEG23 SEG1 SEG22 SEG2 SEG21 SEG3 SEG20 33