EM85000 Datasheet | ELAN Microelectronics Corp

DESCRIPTION The EMC ADB Mouse Controller is a mouse controller for apple mouse system. The following functions are supported: - Controller receives mand or data from Host. - Controller transmits data to Host. FEATURES - Two-button mouse and trackball controller. - Key Lock function is available. - Both photo discharge and non-discharge modes are available. - Discharge mode can reduce X,Y DC offset level. - Dynamic LEDs Control to reduce system power consumption. - Four stages sample rate at 1KHz,2.5KHz,5KHz,10KHz. - Include Noise Immunity methodology to avoid false entry. - Operating frequence at 3.58MHz. - 18 Pin DIP. PIN ASSIGNMENTS DISC LLED VDD RESET VSS X1 X2 R M 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 DIN DOUT OSCI OSCO VDD DLED LOCK Y1 Y2 - This specification are subject to be changed without notice. APPLE DESKTOP BUS MOUSE CONTROLLER PIN DESCRIPTIONS Symbol DISC LLED VDD RESET VSS X1,X2 R M Y1,Y2 LOCK DLED OSCO OSCI DOUT DIN I/O I O I I I I I I O O I O I Function H=discharge mode,L=non-discharge mode.(internal pull low) Trackball lock led display. +5v power. Low active for chip reset. GND. Horizontal direction status for x counter data. Right mouse key. (internal pull high) Main mouse key. (internal pull high) Vertical direction status for y counter data. Optional trackball key lock button to lock /M key. (internal pull high) Active low to turn on photo LEDs. Crystal clock output. Crystal clock input. Transmit data to Host.(open drain) Receive data or mand from Host. FUNCTION DESCRIPTIONS The ADB Mouse Controller is municated with Host by the ADB bus.Only Host sends mand to mouse controller,the mouse doesn’t send any mand to the other devices or Host on the bus.The signal of the data or mand is transmitted by asynchronous protocol.First,Host sends Attention and Sync signals to synchronize all devices on the bus,then sends mand or data according the mand defined. If the addess which the device receives in mand is the...