EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr GENERAL DESCRIPTION The EM84520 Scrolling Mouse Controller is specially designed to control serial mouse or PS/2 mouse device. This single chip can interface three key-switches and 4 X-Y photo-couples plus Z-axis directly to RS-232C or 8042 controller. There are four types Z-axis inputs used to implement scrolling mouse functionality. FEATURES Using 50kΩ ±1% resistor for RC oscillation. Compatible with legacy PS/2 mouse. Compatible with Microsoft serial scrolling mouse. Compatible with Microsoft PS/2 scrolling mouse. Serial or PS/2 port auto-detect. 100 bytes PnP ID code could be filled by code layer. Built-in noise immunity circuit. The sampiling rate of motion detector is up to 65KHz. Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD. CMOS push-pull RXD output. Built-in current comparator for photo-couples input. Built-in three step dynamic input impedance. Three key-switches and four photo-couples inputs. RTS debouncing circuit included. Photo couple test mode included. Low power dissipation. Six types Z direction input: 1. Photo couples input. (Z/1) 4. Mechanical input. (Z/1) 2. Key-switches input. 5. Photo couples input. (Z/4) 3. Voltage-sensing input. 6. Mechanical input. (Z/2) • Package type: EM84520AP : 16DIP, Photo couples input. (Z/1) EM84520DP: 16DIP, Mechanical input. (Z/1) EM84520BP : 16DIP, Key-switches input. EM84520EP : 16DIP, Photo couples input. (Z/4) EM84520CP : 16DIP, Voltage-sensing input. EM84520FP : 16DIP, Mechanical input. (Z/2) • • • • • • • • • • • • • • • • • APPLICATION • Serial PnP scrolling mouse. • PS/2 scrolling mouse. • Combo PnP scrolling mouse. PIN ASSIGNMENT EM84520A/B/C/D/E/F VDD OSC.OUT Z1 Z2 CLK/RTS DATA/RXD OPT VSS 1 2 3 4 5 6 7 8 * This specification are subject to be changed without notice. 16 15 14 13 12 11 10 9 OSCR Y2 Y1 X2 X1 L M R 6.28.1999 1 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER FUNCTIONAL BLOCK DIAGRAM inary m i l e r P THREE TYPES SELECTOR COMPARATOR VOLTAGE KEY-SWITCH SENSOR DETECTOR Z1 Z2 DATA/RXD CLK/RTS Z-AXIS COUNTER C O M P A R A T O R OPT X1 X2 Y1 Y2 L M R D ME OT TE IC OT NO R D E B O U N C E COUNTER DATA I/O MULTIPLEXER COMMAND STATUS TIMING CONTROLLER SYSTEM CLOCK GENERATOR OSCR OSC.OUT RC OSCILLATION PIN DESCRIPTIONS Symbol I/O OPT I/O OSC.OUT O OSCR CLK/RTS I I/O DATA/RXD I/O R M L X1 X2 Y1 Y2 Z1 Z2 I I/O I/O I I I I I I VSS VDD Function INPUT: 200kohm pull low to VSS. When OPT is connected to VDD, EM84520 will enter test mode. In test mode, L will be the output of X1,while M will be the output of X2. Toggling R key can change these output to be Y1,Y2 or Z1,Z2 respectively. OUTPUT: 2kHz Z-axis LED driving source with A/D/E/F version. "1"= VDD, "0"= floating High duty is about 60us. The RC oscillation clock output. Or 3mA sink current output for X, Y photo emitters. Connect 50kΩ±1% precise resistor for oscillation. Connect to 8042 auxiliary port CLK line in PS/2 mode or connect directly to RS232C RTS pin in serial mode. Auto-detect the operating port by this pin. Connect to 8042 auxiliary port DATA line in PS/2 mode or connect directly to RS232C RXD pin in serial mode. Three key-switches inputs. 200kΩ resistor pull low. In Z-axis key mode, M key toggling can change the scrolling speed from low to high. Three step dynamic input impedance. If OSC.OUT is not connected to LEDs, the dynamic input impedance will be off. Use current comparator to measure photo-couples "ON", or "OFF". Z-axis input. Photo mode : Three steps dynamic input impedance. Current comparator input. Key mode : 200 kΩ resistor pull low. 7 levels increased by "M" key. Voltage mode : 200 kΩ resistor pull low. 7 levels voltage comparator. Mechanical mode : 13.2kΩ resistor pull low. Current comparator input. Negative power. Power line. * This specification are subject to be changed without notice. 6.28.1999 2 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr FUNCTION DESCRIPTIONS (I) Serial Scrolling Mouse : In Microsoft mode, the transmission cycle consists of four bytes in one report. Each byte contains one start bit, 7 data bits and two stop bits. The first byte contains "L", "R" key status and four bits of the two most significant bits in horizontal counter and vertical counter. The second byte represents the value accumulated by horizontal counter, the third byte is the data of the vertical counter. The last byte contains "M" key status and Z-axis value. The vertical data is transmitted in 2's complement. Output byte arrange Bit no. 1st byte 2nd byte 3rd byte 4th byte ...... ...... .... .... .... 6 1 0 0 0 5 L H5 V5' 0 4 R H4 V4' M 3 V7' H3 V3' Z3 2 V6' H2 V2' Z2 1 H7 H1 V1' Z1 0 H6 H0 V0' Z0 Plug & Play ID code When RTS input from low to high, EM84520 will send a string ID code. Customer can specify the contains of the code area and the total lenth below 100 bytes by changing the code layer. Field Name Other ID Begin ID PnP Revision EISA ID Product ID Serial Number Class ID Driver ID User Name Length <17 1 2 3 4 9 <34 <42 <42 Check sum End PnP 2 1 Field Data 4D, 5A, 40, 00, 00, 00 08 01, 24 25, 2D, 23 10, 10, 10, 11 3C 3C, 2D, 2F, 35, 33, 25 3C, 30, 2E, 30, 10 26, 10, 21 3C, 25, 2D, 23, 00, 33, 23, 32, 2F, 2C, 2C, 29, 2E, 27, 00, 33, 25, 32, 29, 21, 2C, 00, 2D, 2F, 35, 33, 25 21, 15 09 Description ID for legacy Begin PnP ID Version 1.00 EMC 0001 None provided Mouse Class PnP0F0A EMC SCROLLING SERIAL MOUSE 2 bytes checks um End PnP ID (II) Legacy PS/2 mouse operating: (A) Operating mode There are four operating modes in PS/2 mouse: a. Reset Mode: In this mode a self-test is initiated during power-on or by a Reset command. After reset signal, PS/2 mouse will : (a) Send completion code AA & ID code 00. (b) Set default : * This specification are subject to be changed without notice. 6.28.1999 3 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P sampling rate: 100 reports/s non-autospeed stream mode 2 dot/count disable b. Stream Mode: The maximum rate of transfer is the programmed sample rate. Data report is transmitted if (a) switch is pressed (b) movement has been detect c. Remote Mode: Data is transmitted only in response to a Read Data command. d. Wrap Mode: Any byte of data sent by the system, except hex EC ( Reset wrap mode ) or hex FF ( Reset ), is returned by EM84520. B). PS/2 Mouse Data Report: a). In stream mode: A data report is sent at the end of a sample interval. b). In remote mode: A data report is sent in response to Read Data command. c). Data report format: Byte 1 2 3 Bit 0 1 2 3 4 5 6 7 0-7 0-7 Description Left button status; 1 = pressed Right button status; 1 = pressed Middle button status; 1 = pressed Reserve X data sign; 1 = negative Y data sign; 1 = negative X data overflow; 1 = overflow Y data overflow; 1 = overflow X data ( D0 - D7 ) Y data ( D0 - D7 ) * This specification are subject to be changed without notice. 6.28.1999 4 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr C) PS/2 mouse Data Transmission: a). EM84520 generates the clocking signal when sending data to and receiving data from the system. b). The system requests EM84520 receive system data output by forcing the DATA line to an inactive level and allowing CLK line to go to an active level. c). Data transmission frame: Bit 1 2-9 10 11 Function Start bit ( always 0 ) Data bits ( D0 - D7 ) Parity bit ( odd parity ) Stop bit ( always 1 ) d). Data Output ( data from EM84520 to system ): If CLK is low ( inhibit status ) , data is no transmission. If CLK is high and DATA is low ( request-to-send ), data is updated. Data is received from the system and no transmission are started by EM84520 until CLK and DATA both high. If CLK and DATA both are high, the transmission is ready. DATA is valid prior to the falling edge of CLK and beyond the rising edge of CLK. During transmission, EM84520 check for line contention by checking for an inactive level on CLK at intervals not to exceed 100u sec. Contention occurs when the system lowers CLK to inhibit EM84520 output after EM84520 has started a transmission. If this occurs before the rising edge of the tenth clock, EM84520 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. Following a transmission, the system inhibits EM84520 by holding CLK low until it can service the input or until the system receives a request to send a response from EM84520. e). Data Input ( from system to EM84520 ): The system first check if EM84520 is transmitting data. If EM84520 is transmitting, the system can override the output forcing CLK to an inactive level prior to the tenth clock. If EM84520 transmission is beyond the tenth clock, the system receives the data. If EM84520 is not transmitting or if the system choose to override the output, the system force CLK to an inactive level for a period of not less than 100µ sec while preparing for output. When the system is ready to output start bit (0), it allows CLK go to active level. If request-to-send is detected, EM84520 clocks 11 bits. Following the tenth clock EM84520 checks for an active level on the DATA line, and if found, force DATA low , and clock once more. If occurs framing error, EM84520 continue to clock until DATA is high, then clocks the line control bit and request a Resend. When the system sends out a command or data transmission that requires a response, the system waits for EM84520 to response before sending its next output. D). PS/2 Mouse Error Handling: a). A Resend command ( FE ) following receipt of an invalid input or any input with incorrect parity. b). If two invalid input are received in succession, an error code of hex (FC) is send to the system. * This specification are subject to be changed without notice. 6.28.1999 5 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P c). The counter accumulators are cleared after receiving any command except “Resend”. d). EM84520 receives a Resend command ( FE ), it transmit its last packet of data. e). In the stream mode “Resend” is received by EM84520 following a 3-byte data packet transmission to the system. EM84520 resend the 3-byte data packet prior to clearing the counter. f). A response is sent within 25 ms if a). The system requires a response b). An error is detected in the transmission g). If EM84520 is in the stream mode : a). The system disables EM84520 before issuing any command requiring a response. b). When a command requiring a response is issued by the system ,another command should not be issue until either the response is received or 25ms has passed. E). PS/2 Mouse Commands Description: There are 16 valid commands that transmits between the system and EM84520. The “FA” code is always the first response to any valid input received from the system other than a Set Wrap Mode or Resend command. The following table list the commands: Hex Code FF FE F6 F5 F4 F3,XX F2 F0 EE EC EB EA E9 E8,XX E7 E6 Command Reset Resend Set Default Disable Enable Set Sampling Rate Read Device Type Set Remote Mode Set Wrap Mode Reset Wrap Mode Read Data Set Stream Mode Status Request Set Resolution Set Auto-speed Reset Auto-speed EM84520 echo code FA,AA,00 XX,(XX,XX) FA FA FA FA,FA FA,00 FA FA FA FA,XX,XX,XX FA FA,XX,XX,XX FA,FA FA FA The following describes valid commands: a). Reset ( FF ) EM84520 operation: a). Completion the reset. b). Transmitted FA, AA, 00 to the system. * This specification are subject to be changed without notice. 6.28.1999 6 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr c). Set default: sampling rate: 100 reports/s non-autospeed stream mode 2 dots/count disable b). Resend ( FE ) a). Any time EM84520 receives an invalid command, it returns a Resend command to the system. b). When EM84520 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. c). In stream mode, if a Resend command is received by EM84520 immediately following a 3-byte data packet transmission to the system. c). Set Default ( F6 ) The command reinitializes all conditions to the power-on defaults. d). Disable ( F5 ) This command is used in the stream mode to stop transmissions from EM84520. e). Enable ( F4 ) Begins transmissions, if in stream mode. f). Set Sampling Rate ( F3,XX ) In the stream mode, this command sets the sampling rate to the value indicated by byte hex XX, shown in following: Second byte XX 0A 14 28 3C 50 64 C8 Sample Rate 10/sec 20/sec 40/sec 60/sec 80/sec 100/sec 200/sec g). Read Device Type ( F2 ) EM84520 always echoes “ FA,00 “ following this command. h). Set Remote Mode ( F0 ) Data value are reported only in response to a Read Data command. i). Set Wrap Mode ( EE ) Wrap mode remains until Reset ( FF ) or Reset Wrap Mode( EC ) is received. j). Reset Wrap Mode ( EC ) EM84520 returns to the previous mode of operation after receiving this command. k). Read Data ( EB ) * This specification are subject to be changed without notice. 6.28.1999 7 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P This command is executed in either remote or stream mode. The data is transmitted even if there has been no movement since the last report or the button status is unchanged. Following a Read Data command, the registers are cleared after a data transmission. l). Set Stream Mode ( EA ) This command sets EM84520 in stream mode. m). Status Request ( E9 ) When this command is issued by the system, EM84520 respond with a 3-byte status report as follows: Byte 1 2 3 Bit 0 1 2 3 4 5 6 7 0-7 0-7 Description 1 = Right button pressed 1 = Middle button pressed 1 = Left button pressed Reserved 0 = Normal speed, 1 = Autospeed 0 = Disabled, 1 = Enabled 0 = Stream mode, 1 = Remote mode Reserved Current resolution setting ( D0 - D7 ) Current sampling rate ( D0 - D7 ) n). Set Resolution ( E8,XX ) EM84520 provides four resolutions selected by the second byte of this command as follows: Second Byte XX 00 01 02 03 Resolution 8 dots/count 4 dots/count 2 dots/count 1 dot/count o). Set Autospeed ( E7 ) At the end of a sample interval in the stream mode, the current X and Y data values are converted new values. The sign bits are not involved in this conversion. The conversion is only in stream mode. The relationship between the input and output count follows: Input 0 1 2 3 4 5 N(≥6 ) Ouput 0 1 1 3 6 9 2.0*N p). Reset Autospeed ( E6 ) This command restore normal speed. * This specification are subject to be changed without notice. 6.28.1999 8 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr (III). Microsoft PS/2 scrolling mouse mode: (A) Entering procedure: Except in WRAP mode, while EM84520 received the following consecutive command. i. F3 C8 ii. F3 64 iii. F3 50 ---- set sampling rate 200/sec ---- set sampling rate 100/sec ---- set sampling rate 80/sec (B) Operating: a. All of the commands in legacy mode still be valid. b. The ID code of read device type command (F2) will changed from "00" to be "03". c. Data report will be four bytes format: Byte 1 2 3 4 Bit 0 1 2 3 4 5 6 7 0-7 0-7 0-7 Description Left button status; 1 = pressed Right button status; 1 = pressed Middle button status; 1 = pressed Reserve X data sign; 1 = negative Y data sign; 1 = negative X data overflow; 1 = overflow Y data overflow; 1 = overflow X data ( D0 - D7 ) Y data ( D0 - D7 ) Z data ( D0 - D7 ) (C) Exiting Microsoft scrolling mode: There are two ways to exit: a. Power off. b. Reset command (FF). (IV). Z-axis Input Function : (a) Photo couples input : Z-axis counter accumulates the Z1, Z2 phase changed by movement. (b) Key-switches input : Pressing Z1, Z2 will start to fill the Z-axis counter with the value beginning at one. Toggling "M" key can increase the value any time by one. The limit value is ±7. (c) The relationship between the value and the transmission rate as follows : * This specification are subject to be changed without notice. 6.28.1999 9 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P Value 1 2 3 4 5 6 7 Rate per second 2.7 6.4 9.2 12.8 15 18 20 (d) Voltage-sensing mode : There are 7 voltage levels in Z1, Z2 input. The transmission table is the same as key-switches mode. The relationship between the value of Z-axis counter and the voltage as folllows : Value 0 1 2 3 4 5 6 7 Under VDD=5V condition. Voltage 1V↓ 1.0V-1.6V 1.6V-2.2V 2.2V-2.8V 2.8V-3.4V 3.4V-4.0V 4.0V-4.6V 4.6V↑ (e) Mechanical mode : The same as optical wheel mode. * This specification are subject to be changed without notice. 6.28.1999 10 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ABSOLUTE MAXIMUM RATINGS ary n i m i l e Pr Parameter Temperature under bias Storage temperature range Supply voltage Power dissipation Ratings Unit Min. 0 -65 -0.3 - Max. 70 150 7.5 500 °C °C V mW DC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C) Parameters X1,X2,Y1,Y2,Z1,Z2 (photo mode) low input reference current X1,X2,Y1,Y2,Z1,Z2 (photo mode) high input reference current X1,X2,Y1,Y2,Z1,Z2 (photo mode) input current (input impedance) (80µA) X1,X2,Y1,Y2,Z1,Z2 (photo mode) input current (input impedance) (500µA) L,M,R,OPT,Z1,Z2 (key mode) input low voltage L,M,R,OPT,Z1,Z2 (key mode) input high voltage Z1,Z2 (voltage mode) sensitivity L,M,R,Z1,Z2 (key & voltage mode) input current (Vin=5V) OPT input current OPT high output current (Iopt=20mA) L,M,R,X1,X2,Y1,Y2,Z1,Z2 input leakage current (Vin=0V) OPT input leakage current (Vin=5V) OSC.OUT Sink current * This specification are subject to be changed without notice. Sym. Min. Typ. Max. Unit IPL 70 - - µA IPh - - 106 µA VPI1 0.8 - 1.2 V VPI2 1.5 - 2.1 V Vail - - 1.5 V Vaih 3.5 - - V Vs -0.3 - +0.3 V Imi 18 - 56 µA Ixi -18 - -56 µA Vopt 4.5 - - V Iil 0 - -1.0 µA Iih 0 - 1.0 µA Iosc 3 - 3.6 mA 6.28.1999 11 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER PS/2 mouse mode : (TA=25°C to 70°C) inary m i l e r P Parameters Sym. Min. Typ. Max. Unit VDD IOp Vt+ 4.5 3.2 5 - 5.5 1 3.8 V mA V Vt - 1.2 - 1.9 V Idc 0.56 - 1.86 mA Vprl - - 0.4 V Parameters Sym. Min. Typ. Max. Unit Operating voltage VDD VRTS Iop1 Iop2 Irts1 Irts2 Irh Irl Vrts+ Vrts- 4 3 4 2 9.6 - 5.6 12.2 - 6.2 13 1 1.8 -2 6.8 V V mA mA mA mA mA mA V V Typ. Max. Unit Operating voltage Operating current CLK, DATA postive-going threshold voltage CLK, DATA negative-going threshold voltage DATA, CLK input current DATA,CLK low output voltage (no load) (Vin=0V ) (Iprl=-2mA) Serial mouse mode : (TA=25°C to 70°C) Operating current Operating current RTS operating current RTS operating current RXD high output voltage RXD low output voltage RTS high input voltage RTS low input voltage (VDD=5.4, RTS=VDD) (VDD=6.2, RTS=VDD) (VDD=5.6, RTS=11V) (VDD=5.4, RTS=12.5V) (Vrh=Vrts-2.6V) (Vrl=Vss+2.6V) * All parameters in above table are compared with VSS. AC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C) PS/2 mouse mode : Parameters Sym. Min. Oscillating Frequency Key Debounce Rising Edge Crossed Width Falling Edge Crossed Width Mouse CLK Active Time Mouse CLK Inactive Time Time that Mouse Sample DATA from CLK rising Edge System CLK Active Time System CLK Inactive Time Time from DATA Transition to Falling Edge of CLK Time from rising Edge of CLK to DATA Transition Time to mouse Inhibit after the 11th CLK to ensure mouse does not start another Transmission * This specification are subject to be changed without notice. Fosc Tkd Tr Tf Tmca Tmci Tmdc 37.0-3% 13.5 13.5 - 37.0 12 40.5 40.5 13.5 37.0+3% - KHz ms us us us us us Tsca Tsci Tsdc Tscd Tpi 0 40.5 40.5 13.5 27.0 - 50 us us us us us 6.28.1999 12 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr Serial mouse mode : Parameters Oscillating Frequency Key Debounce Rising Edge Crossed Width Falling Edge Crossed Width Transmission Time Start bit Time Data bit time Stop bit Time Mode code delay Time Sym. Min. Typ. Max. Unit Fosc Tkd Tr Tf Tmx Ts Td Tp Trd 32.4-3% 15.4 15.4 11 32.4 13 33.33 833.3 833.3 833.3 - 32.4+3% 14 KHz ms us us ms us us us ms X1, X2,Y1,Y2, Z1, Z2 (photo mode) Input Impedance Max. 16.0K 15.0K Typ. 14.0K 13.0K 12.0K Min. 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 10.0M 2.0 3.0 4.0 5.0 VOLTS (LIN) * This specification are subject to be changed without notice. 6.28.1999 13 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P TIMING DIAGRAM (A) PS/2 mouse mode : (A) Photo-couples pulse width X1(Y1) X2(Y2) Tr Tf (B) Receiving Data 1st CLK Inhibit 2nd CLK 9th CLK 10th CLK 11th CLK CLK Tmca Tmci Tmdc DATA Start Bit Parity Bit Bit0-Bit7 Stop Bit Line Control Bit (C) Sending Data 1st CLK 10th CLK 2nd CLK 11th CLK CLK Tsci Tsca Tsdc Tpi Tscd DATA Start Bit Bit0-Bit7 * This specification are subject to be changed without notice. Parity Bit Stop Bit 6.28.1999 14 EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr (B) Serial mouse mode : (A) RXD output : Key in/release Mouse RXD Tmx Tmx (B) Bytes structure : RXD 1st 2rd 3nd 4nd (C) Bits structure : RXD LINE Data Bit no. 0 Ts Td 1 2 Td Td 4 5 6 Td Td 3 Td Td TP Tp 0 1 (D) PnP ID code echo timing : RTS >< Trd RXD 4D 5A 40 00 00 "4D" code Bit no Ts 0 1 * This specification are subject to be changed without notice. 2 00 08 3 4 PnP ID code 5 09 Tp Tp 6.28.1999 15 DTR SG DSR RTS RXD TXD 5 6 7 8 9 3 4 1 2 GND +5V CLK DATA 1 2 3 4 5 6 * This specification are subject to be changed without notice. 50K* CLK/RTS VDD 8 V SS 16 OSCR EM84520A EM84520E OSC.OUT 7 OPT 2 6 DATA/RXD 5 1 1KΩ R M L Z1 Z2 X1 X2 2 chips analog PT 4 chips digital PT 9 10 11 3 4 12 13 Y1 14 Y2 15 * 50 kΩ must be precise resistor under ±1% 5.1V 1KΩ 0.1µF 10µF EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P APPLICATION CIRCUIT 6.28.1999 16 RXD TXD DTR SG DSR RTS 1 2 3 4 5 6 7 8 9 GND +5V CLK DATA 1 2 3 4 5 6 * This specification are subject to be changed without notice. 50K* CLK/RTS VDD 8 V SS 16 OSCR EM84520B OSC.OUT 7 OPT 2 6 DATA/RXD 5 1 1KΩ R M L Z1 Z2 X1 X2 Y1 Y2 * 50 kΩ must be precise resistor under ±1% 5.1V 2 chips analog PT 4 chips digital PT 9 10 11 3 4 12 13 14 15 0.1µF 10µF EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr 6.28.1999 17 8 9 4 5 6 7 DTR SG DSR RTS 2 3 RXD TXD 1 GND +5V CLK DATA 1 2 3 4 5 6 5.1V * This specification are subject to be changed without notice. 8 V SS EM84520C 16 OSCR OSC.OUT 7 OPT 2 1KΩ R M L Z1 Z2 X1 X2 Y1 Y2 2 chips analog PT 4 chips digital PT 9 10 11 3 4 12 13 14 15 * 50 kΩ must be precise resistor under ±1% 50K* CLK/RTS VDD 6 DATA/RXD 5 1 0.1µF 10µF EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER inary m i l e r P 6.28.1999 18 RTS RXD TXD DTR SG DSR 5 6 7 8 9 2 3 4 1 GND +5V CLK DATA 1 2 3 4 5 6 * This specification are subject to be changed without notice. 50K* CLK/RTS VDD 8 V SS EM84520D EM84520F 16 OSCR OSC.OUT 7 OPT 2 6 DATA/RXD 5 1 1KΩ R M L Z1 Z2 X1 X2 ** COM 4 chips digital PT B A 2 chips analog PT 9 10 11 3 4 12 13 Y1 14 Y2 15 * 50 kΩ must be precise resistor under ±1% ** Mechanical wheel 5.1V 0.1µF 10µF EM84520 2-IN-ONE SCROLLING MOUSE CONTROLLER ary n i m i l e Pr 6.28.1999 19