1 multimedia ics ps / 2 mouse controller BU9206 the BU9206 is a ps / 2 mouse communication controller for pcs. this processor shapes waveforms and counts sig- nals from the mouse rotary encoder as the mouse is moved, to provide two-way communication between mouse and pc system. applications pc mouse features 1) for ps / 2 mouse. 2) compatible with a wide range of input signals, be- cause it automatically sets the input threshold levels for the x and y direction, corresponding to the out- put level of the rotary encoder inside the mouse. 3) cmos process enables low current consumption. absolute maximum ratings (ta = 25?) parameter v dd pd topr tstg ?0.3 ~ + 7.0 1000 * ?25 ~ + 75 ?55 ~ + 125 v symbol limits unit mw c c v in ?0.3 ~ v dd + 0.3 v v out ?0.3 ~ v dd + 0.3 v * reduced by 10 mw for each increase in ta of 1 c over 25 c. power supply voltage power dissipation operating temperature storage temperature input voltage output voltage recommended operating conditions (ta = 25?) parameter v dd 4.5 5.0 5.5 v v dd v ih2 0.4 * v dd ? dd v sclk, sdata v il2 0 0.16 * v dd v sclk, sdata v aup 0.3 * v dd 0.8 * v dd v xa, xb, ya, yb v alp 0 0.48 * v aup v xa, xb, ya, yb swr, swl, test2b, test1b, test0, resetb v ih1 0.8 * v dd ? dd v swr, swl, test2b, test1b, test0, resetb v il1 0 0.2 * v dd v symbol min. typ. max. unit application pin power supply voltage h input voltage 1 h input voltage 2 l input voltage 1 l input voltage 2 xy input h voltage xy input l voltage
2 multimedia ics BU9206 block diagram 1 2 3 4 5 6 7 8 swr swl xa xb ya yb sclk v ss v dd sdata resetb osc1 osc2 test0 test1b test2b 16 15 14 13 12 11 10 9 peak det. accumlator comp. comp. peak det. accumlator comp. comp. regi. sclk gen. i / o inhibit osc data decoder data shifter for output data shifter for input scaling and turbo sample timing data encoder clk gen. regi. latch latch noise cancel noise cancel
3 multimedia ics BU9206 pin descriptions pin no. pin name swr 1in i / o i / o format function right switch input pull-up resistor built in low active left switch input pull-up resistor built in low active serial clock input / output pull-up resistor built in open drain output tip test input pull-up resistor built in low active normally open or connected to v dd pull-up resistor built in normally connected to gnd swl 2in xa 3in rotary encoder x-direction, a-phase input rotary encoder x-direction, b-phase input rotary encoder y-direction, a-phase input rotary encoder y-direction, b-phase input xb 4in ya 5in yb 6in sclk 7 i / o v ss 8 input / output reference voltage: 0v test2b 9in test1b 10 in test0 11 in swr swl xa xb ya yb typ.38k w test1b test2b typ.11k w turbo typ.38k w typ.5k w vref comp + ?
4 multimedia ics BU9206 pin no. pin name osc2 12 in i / o i / o format function pin to connect oscillator for clock connect a 4mhz oscillator between osc1 and osc2. osc1 13 out resetb 14 in reset input pull-up resistor built in low active sdata 15 i / o v dd 16 power supply pin connect a 4.5 - 5.5v power supply. serial data input / output pull-up resistor built in open drain output resetb osc2 osc1 sdata typ.38k w typ.5k w
5 multimedia ics BU9206 electrical characteristics (unless otherwise noted, ta = 25?, v dd = 5.0v) parameter symbol conditions applied pin i dd f ck = 4.0mhz v dd min. 0.5 typ. 2.1 max. 4.0 unit ma v ol1 i sink = 4.0ma sclk, sdata 0.43 0.6 v i il1 v in = v ss swr, swl, test0, resetb 98 130 195 m a i il2 v in = v ss test1b, test2b 330 440 660 m a i il3 v in = v ss sclk, sdata 0.75 1.0 1.5 ma i il4 v in = v ss xa, xb, ya, yb 10 m a i ih1 v in = v dd swr, swl, test0, resetb 10 m a i ih2 v in = v dd test1b, test2b 10 m a i ih3 v in = v dd sclk, sdata 10 m a i ih4 v in = v dd xa, xb, ya, yb 10 m a i osc v in = gnd or v dd osc2 6 20 m a f osc oscillation frequency osc1 4.0 mhz supply current output low level voltage 1 input low level current 1 input low level current 2 input low level current 3 input low level current 4 input high level current 1 input high level current 2 input high level current 3 input high level current 4 osc2 input current application circuit 1 2 3 4 5 6 7 8 swr swl xa xb ya yb sclk v ss v dd sdata v ss sclk v dd sdata resetb osc1 osc2 test0 test1b test2b 16 15 14 13 12 11 10 9 fig. 1
6 multimedia ics BU9206 external dimensions (units: mm) dip16 0.51min. 0.3 0.1 9 16 8 1 6.5 0.3 3.2 0.2 4.25 0.3 0.5 0.1 19.4 0.3 2.54 0 ~ 15 7.62
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