MITSUMI LCD Interface MM1323 LCD Interface Monolithic IC MM1323 Outline This IC was developed for interface with digital video equipment having an LCD monitor. It can be used as interface for CPU, DSP and LCD drivers that output RGB signals after output polarity inversion and γ correction processing. It has a built-in post filter (5MHzLPF), 16.5dB amp and 20dB common amp. Features 1. 2. 3. 4. Built-in post filter 5MHz LPF Built-in amp GV=16.5dB Adjustable white balance Built-in common amp GVCOM=20dB Package SSOP-24 (0.8mm pitch) TSOP-24 (0.5mm pitch) Applications 1. Navigation systems 2. Digital cameras 3. Pachinko games (with color TFT) 4. Videophones, conferencing systems 5. Other game equipment Circuit Connection Diagram RGB signal after polarity inversion and γ correction processing MITSUMI Block Diagram LCD Interface MM1323 LCD Interface MM1323 MITSUMI Pin Description Pin no. Pin name Function 1 VCC2 2 VCC1 3 frpv IN 4 RW/B CT1 5 BW/B CT1 6 R IN 7 B IN 8 B IN 9 NC 10 DC CONT IN DC control input 11 COMMON IN Common input White balance control RGB input Internal equivalent circuit diagram LCD Interface MM1323 MITSUMI Pin no. Pin name 12 VEE 13 DC OUT 14 Vee 15 COMMON OUT 16 VCC2 17 DC DETECT 18 GND Function DC output Output detection 19 21 DC DETECT Output detection 23 20 B OUT 22 G OUT 24 R OUT RGB output Internal equivalent circuit diagram LCD Interface MM1323 MITSUMI Electrical Characteristics Item (Except where noted otherwise, Ta=25°C, VCC1=4.9V, VCC2=6.5V, VEE=-6.5V all SW ; A) Symbol VCC1 Operating power supply voltage VCC2 VEE ICC1 Consumption current ICC2 IEE RGB Voltage gain GV Voltage gain difference between channels GVCH Output dynamic range Output center voltage Load fluctuation Frequency characteristic Measurement conditions Min. 4.8 6.0 -7.0 No load No load No load Typ. 4.9 6.5 -6.5 11.5 8.5 7.0 Measure voltage gain difference between each RGB R-B -0.5 0.0 channel. G-B -0.5 0.0 VC Units V V V mA mA mA R 16.0 16.5 17.0 SW1, SW2, SW3=B V1, V2=1.5V G 16.0 16.5 17.0 dB TP5, TP6, TP7=0.6VP-P, 100kHz sine wave Measure sine wave ratio between input signal and TP12, 13 and 14 B 16.0 16.5 17.0 R-G -0.5 0.0 VODR Max. 5.0 7.0 -6.0 15.0 11.0 9.0 SW1, SW2, SW3=B V1, V2=1.5V TP5, TP6, TP7=0.6VP-P 100kHz sine wave Vary input signal amplitude and measure TP12, 13 and 14 amplitude at the point where TP12, 13 and 14 signals start to saturate. Input a 0.6VP-P, 7.86kHz rectangular wave to TP5, 6 and 7, and measure TP12, 13 and 14 center voltage. 0.5 0.5 0.5 dB R 4.25 VP-P G 4.25 B R G B R G B 4.25 2.3 2.5 2.3 2.5 2.3 2.5 -0.2 0 -0.2 0 -0.2 0 VOL Measure TP12, 13 and 14 DC voltage fluctuation when TP12, 13 and 14 load current is varied from 0 ±6mA. R 4.0 5.0 FC SW1, SW2, SW3=B V1, V2=1.5V TP5, TP6, TP7=0.6VP-P sweep signal For 100kHz, measure frequency when attenuated -3dB relative to TP12, 13 and 14 signals. G 4.0 5.0 B 4.0 5.0 TP1=5.0VP-P 7.86kHz rectangular wave R 1.5 TP1, then measure amplitude. B 1.5 TP1=5.0VP-P 7.86kHz rectangular wave R 1.5 B 1.5 2.7 2.7 2.7 0.2 0.2 0.2 V V W/B Common-mode output amplitude VW/BO1 Confirm that TP12 and 14 signals are in phase with Negative-phase output amplitude VW/BO2 Confirm that TP12 and 14 signals are reverse phase frpv input threshold voltage VT Measure TP18 voltage, then impress that voltage on TP18. Given V1=0V, add DC voltage to TP1. Raise gradually from 0V and measure TP1 voltage when TP14 voltage goes over 2.5V. VC R TP1=5.0VP-P 7.86kHz rectangular wave CommonAdjust V1 and V2 within 0~1.5V (in mode B phase) and set TP12 and 14 amplitude at 1.5V. Measure TP12 and TP14 center R voltage. NegativeMeasure in the same way for V1 and V2 phase B adjusted within 1.5~3.0V (reverse phase). Output center voltage from TP1, then measure amplitude. VP-P VP-P 1.0 1.7 2.4 2.3 2.5 2.7 2.3 2.5 2.7 2.3 2.5 2.7 2.3 2.5 2.7 V V COMMON COMMON voltage gain GVCOM COMMON output center voltage VCO COMMON load fluctuation Center DC adjustment Output voltage L Output voltage H VOLC VOL VOH SW4=B TP9=1.0VP-P 100kHz sine wave Measure ratio of input signal and TP11 sine wave. SW4=B TP9=1.0VP-P 7.86kHz rectangular wave Measure TP11 center voltage. Measure TP11 DC voltage fluctuation when TP11 load current is varied from 0 ±100mA. SW5=B, V3=0V, Measure TP10 DC voltage. SW5=B, V3=3V, Measure TP10 DC voltage. 19.5 20.0 20.5 dB -0.2 0 0.2 V -0.5 0 0.5 V -1.3 -1.0 -0.7 3.7 4.0 4.3 V V LCD Interface MM1323 MITSUMI Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C VCC-GND 8 V VEE-GND -8 V Pd 650 mW Power supply voltage Allowable loss Measuring Circuit