Multimedia ICs PS / 2 Mouse Controller BU9206 The BU9206 is a PS / 2 mouse communication controller for PCs. This processor shapes waveforms and counts signals from the mouse rotary encoder as the mouse is moved, to provide two-way communication between mouse and PC system. •PCApplications mouse •1)Features For PS / 2 mouse. 3) CMOS process enables low current consumption. 2) Compatible with a wide range of input signals, because it automatically sets the input threshold levels for the X and Y direction, corresponding to the output level of the rotary encoder inside the mouse. •Absolute maximum ratings (Ta = 25°C) Parameter Symbol Limits Unit VDD – 0.3 ~ + 7.0 V Power supply voltage Power dissipation 1000∗ Pd mW Operating temperature Topr – 25 ~ + 75 °C Storage temperature Tstg – 55 ~ + 125 °C Input voltage Output voltage VIN – 0.3 ~ VDD + 0.3 V VOUT – 0.3 ~ VDD + 0.3 V ∗ Reduced by 10 mW for each increase in Ta of 1°C over 25°C. •Recommended operating conditions (Ta = 25°C) Parameter Symbol Min. Typ. Max. Unit Power supply voltage VDD 4.5 5.0 5.5 V VDD H input voltage 1 VIH1 0.8∗VDD — VDD V SWR, SWL, TEST2B, TEST1B, TEST0, RESETB H input voltage 2 VIH2 0.4∗VDD — VDD V SCLK, SDATA L input voltage 1 VIL1 0 — 0.2∗VDD V SWR, SWL, TEST2B, TEST1B, TEST0, RESETB Application pin L input voltage 2 VIL2 0 — 0.16∗VDD V SCLK, SDATA XY input H voltage VAUP 0.3∗VDD — 0.8∗VDD V XA, XB, YA, YB XY input L voltage VALP 0 — 0.48∗VAUP V XA, XB, YA, YB 1 Multimedia ICs BU9206 •Block diagram SWR 1 Noise cancel Data decoder Latch 16 VDD 15 SDATA 14 RESETB 13 OSC1 12 OSC2 11 TEST0 10 TEST1B 9 TEST2B Data shifter for input SWL 2 Noise cancel Data shifter for output Latch Peak det. XA 3 Data encoder Comp. Scaling and turbo Accumlator XB 4 Comp. Regi. Clk gen. Peak det. YA 5 Sample timing Osc Comp. Accumlator YB 6 SCLK 7 Comp. SCLK gen. Regi. I / O inhibit VSS 2 8 Multimedia ICs BU9206 •Pin descriptions Pin No. Pin name I/O 1 SWR IN Function Right switch input Pull-up resistor built in Low active 2 SWL IN Left switch input Pull-up resistor built in Low active 3 XA IN Rotary encoder X-direction, A-phase input 4 XB IN Rotary encoder X-direction, B-phase input 5 YA IN I / O format Typ.38kΩ SWR SWL XA XB YA YB + – COMP Rotary encoder Y-direction, A-phase input Vref 6 YB IN Rotary encoder Y-direction, B-phase input Typ.5kΩ Serial clock input / output Pull-up resistor built in Open drain output 7 SCLK I/O 8 VSS — Input / output reference voltage: 0V 9 TEST2B IN Tip test input Pull-up resistor built in Low active — Typ.11kΩ TEST1B TEST2B 10 TEST1B IN Normally open or connected to VDD 11 TEST0 IN Pull-up resistor built in Normally connected to GND Typ.38kΩ TURBO 3 Multimedia ICs BU9206 Pin No. Pin name I/O 12 OSC2 IN Function I / O format Pin to connect oscillator for clock Connect a 4MHz oscillator between OSC1 and OSC2. OSC2 13 14 OSC1 RESETB OSC1 OUT IN Reset input Pull-up resistor built in Low active Typ.38kΩ RESETB Typ.5kΩ 4 15 SDATA I/O 16 VDD — Serial data input / output Pull-up resistor built in Open drain output Power supply pin Connect a 4.5 - 5.5V power supply. SDATA — Multimedia ICs BU9206 •Electrical characteristics (unless otherwise noted, Ta = 25°C, V DD Parameter Supply current Output low level voltage 1 Symbol Min. IDD VOL1 = 5.0V) Typ. Max. Unit 0.5 2.1 4.0 mA fCK = 4.0MHz VDD — 0.43 0.6 V ISINK = 4.0mA SCLK, SDATA Conditions Applied pin Input low level current 1 IIL1 98 130 195 µA VIN = VSS SWR, SWL, TEST0, RESETB Input low level current 2 IIL2 330 440 660 µA VIN = VSS TEST1B, TEST2B Input low level current 3 IIL3 0.75 1.0 1.5 mA VIN = VSS SCLK, SDATA Input low level current 4 IIL4 — — 10 µA VIN = VSS XA, XB, YA, YB Input high level current 1 IIH1 — — 10 µA VIN = VDD SWR, SWL, TEST0, RESETB Input high level current 2 IIH2 — — 10 µA VIN = VDD TEST1B, TEST2B Input high level current 3 IIH3 — — 10 µA VIN = VDD SCLK, SDATA Input high level current 4 IIH4 — — 10 µA VIN = VDD XA, XB, YA, YB OSC2 input current IOSC — ±6 ± 20 µA VIN = GND or VDD OSC2 Oscillation frequency fOSC — 4.0 — MHz OSC1 •Application circuit 1 SWR VDD 16 2 SWL SDATA 15 VDD SDATA VSS SCLK 3 XA RESETB 14 4 XB OSC1 13 5 YA OSC2 12 6 YB TEST0 11 7 SCLK TEST1B 10 8 VSS TEST2B 9 Fig. 1 5 Multimedia ICs BU9206 •External dimensions (Units: mm) 19.4 ± 0.3 9 1 8 0.51Min. 3.2 ± 0.2 4.25 ± 0.3 6.5 ± 0.3 16 7.62 0.3 ± 0.1 2.54 0.5 ± 0.1 DIP16 6 0° ~ 15°