em84502 ELAN Microelectronics Corp, em84502 Datasheet
em84502
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em84502 Summary of contents
Page 1
... Three key-switches and four photo-couples inputs. • Both key-press and key-release debounce interval 12 ms. • Through three key-switches input, EM84502 can exert seven different output. • The motion detector of the EM84502 could sense 8 m/sec maximun with 200 DPI wheels. APPLICATIONS • Optical mouse or pen-mouse. ...
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... Four photo-couple signals denote UP, DOWN, LEFT, and RIGHT state. During the scaning period, as long as the photo-couples change their states, the value of vertical or horizontal counter will increase or decrease accordingly. 30 Kohm 5% pull low for 35 KHz oscillation. EM84502 PS/2 MOUSE CONTROLLER ...
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... C) PS/2 mouse Data Transmission: i). EM84502 generates the clocking signal when sending data to and receiving data from the system. ii). The system requests EM84502 receive system data output by forcing the DATA line to an inactive level and allowing CLK line active level. iii). Data transmission frame: * This specification are subject to be changed without notice ...
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... EM84502 has started a transmission. If this occurs before the rising edge of the tenth clock, EM84502 internal store its data in its buffer and returns DATA and CLK to an active level. If the contention does not occur by the tenth clock, the transmission is complete. ...
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... Resend ( FE ) i). Any time EM84502 receives an invalid command, it returns a Resend command to the system. ii). When EM84502 receives a Resend command, it retransmits its last packet of data. If the last packet was a Resend command, it transmits the packet just prior to the Resend command. iii). In stream mode Resend command is received by EM84502 immediately following a 3-byte data packet transmission to the system ...
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... Following a Read Data command, the registers are cleared after a data transmission. l). Set Stream Mode ( EA ) This command sets EM84502 in stream mode. m). Status Request ( E9 ) When this command is issued by the system, EM84502 respond with a 3-byte status report as follows: Byte Bit 1 0 ...
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... Set Resolution ( E8,XX ) EM84502 provides four resolutions selected by the second byte of this command as follows: Second Byte o). Set Autospeed ( the end of a sample interval in the stream mode, the current X and Y data values are converted new values. ...
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... 0 0 1.5 PI (500 A) Vt+ 3 1.2 Vail - Vaih 3.5 Imi 16.6 Idc 0.56 (VIN=0V) Vprl - (Iprl=-2mA) Iil 0 (Vin=0V =5V. DD 16.0K 15.0K 14.0K 13.0K 12.0K 11.0K 10.0.K 9.0K 8.0K 7.0K 6.0K 5.0K 4.0K 3.0K 2.0K 1.0K 0 1.0 2.0 3.0 10.0M VOLTS (LIN) EM84502 PS/2 MOUSE CONTROLLER Typ. Max. Unit 106 1.0 A 4.0 5.0 6.18.1998 8 ...
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... Tmci - Tmdc - Tsca - Tsci - Tsdc - Tscd - Tpi 2nd 9th 10th 11th CLK CLK CLK CLK > < Tmci • • • • • • • • Stop Parity Bit Bit EM84502 PS/2 MOUSE CONTROLLER Typ. Max. Unit 34.3 34.3+10% KHz 14.3 ...
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... AC Timing point: Output DATA, CLK PIN (PS/2 mouse mode) Input: X1,X2,Y1,Y2 PIN CLK, DATA PIN L,M,R PIN EM84502 I/O pin equivalent circuit : R,M,L : (R,M,L) INTERNAL SIGNAL CLK : PS2 MOUSE ENABLE CLK OUTPUT SIGNAL CLK INPUT SIGNAL * This specification are subject to be changed without notice. 2nd 10th ...
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... APPLICATION CIRCUIT * This specification are subject to be changed without notice. EM84502 PS/2 MOUSE CONTROLLER 6.18.1998 11 ...
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... EM84502 PS/2 MOUSE CONTROLLER TYP. MAX. 3.302 - 1.524 1.549 0.457 - 1.524 - 0.254 - 19.050 19304 6.604 - 7.620 7.874 3.302 - 0.506 - 2.540 - 9.017 9.271 7 ...