EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr GENERAL DESCRIPTION The EM84530 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 directly to RS-232C or 8042 controller. FEATURES • • • • • • • • • • • • • • • • • Include PnP software scrolling function Using 50kΩ ±1% resistor for RC oscillation. Compatible with legacy PS/2 mouse. Compatible with Microsoft serial mouse. Compatible with Microsoft PS/2 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. APPLICATION • Serial PnP mouse. • PS/2 mouse. • Combo mouse. PIN ASSIGNMENT EM84530 VDD OSC.OUT NC NC 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 EM84530 2-IN-ONE MOUSE CONTROLLER inary m i l e r P FUNCTIONAL BLOCK DIAGRAM DATA/RXD CLK/RTS C O M P A R A T O R OPT X1 X2 Y1 Y2 D ME OT TE IC OT NO R COUNTER MULTIPLEXER D E B O U N C E L M R DATA I/O TIMING CONTROLLER COMMAND & STATUS OR PNP IO 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 VSS VDD I I/O I/O I I I I Function INPUT: 200kΩ pull low to VSS. When OPT is connected to VDD, EM84530 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 respectively. The RC oscillation clock output. Or 3mA sink current output for X, Y photo emitters. Connect 50kΩ±1% precise resistor for oscillation. Connect directly to 8042 auxiliary port CLK line in PS/2 mode or connect directly to RS-232C RTS pin in serial mode. Auto-detect the operating port by this pin. Connect directly to 8042 auxiliary port DATA line in PS/2 mode or connect directly to RS-232C RXD pin in serial mode. Three key-switches inputs. 200kΩ resistor pull low. 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". Negative power. Power line. * This specification are subject to be changed without notice. 6.28.1999 2 EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr FUNCTION DESCRIPTIONS (I) Serial 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 only "M" key status. 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' 0 2 V6' H2 V2' 0 1 H7 H1 V1' 0 0 H6 H0 V0' 0 Plug & Play ID code When RTS input from low to high, EM83810 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 Checks um 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 EM84530 2-IN-ONE 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 EM84530. 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 ) C) PS/2 mouse Data Transmission: a). EM84530 generates the clocking signal when sending data to and receiving data from the system. b). The system requests EM84530 receive system data output by forcing the DATA line to an inactive level and allowing CLK line to go to an active level. * This specification are subject to be changed without notice. 6.28.1999 4 EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr 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 EM84530 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 EM84530 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, EM84530 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 EM84530 output after EM84530 has started a transmission. If this occurs before the rising edge of the tenth clock, EM84530 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 EM84530 by holding CLK low until it can service the input or until the system receives a request to send a response from EM84530. e). Data Input ( from system to EM84530 ): The system first check if EM84530 is transmitting data. If EM84530 is transmitting, the system can override the output forcing CLK to an inactive level prior to the tenth clock. If EM84530 transmission is beyond the tenth clock, the system receives the data. If EM84530 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, EM84530 clocks 11 bits. Following the tenth clock EM84530 checks for an active level on the DATA line, and if found, force DATA low , and clock once more. If occurs framing error, EM84530 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 EM84530 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. c). The counter accumulators are cleared after receiving any command except “Resend”. d). EM84530 receives a Resend command ( FE ), it transmit its last packet of data. e). In the stream mode “Resend” is received by EM84530 following a 3-byte data packet transmission to the system. EM84530 resend the 3-byte data packet prior to clearing the counter. * This specification are subject to be changed without notice. 6.28.1999 5 EM84530 2-IN-ONE MOUSE CONTROLLER f). A response is sent within 25 ms if inary m i l e r P a). The system requires a response b). An error is detected in the transmission g). If EM84530 is in the stream mode : a). The system disables EM84530 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 EM84530. 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 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 ) EM84530 operation: a). Completion the reset. b). Transmitted FA, AA, 00 to the system. c). Set default: sampling rate: 100 reports/s non-autospeed stream mode 2 dots/count disable * This specification are subject to be changed without notice. 6.28.1999 6 EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr b). Resend ( FE ) a). Any time EM84530 receives an invalid command, it returns a Resend command to the system. b). When EM84530 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 EM84530 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 EM84530. 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 ) EM84530 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 ) EM84530 returns to the previous mode of operation after receiving this command. k). Read Data ( EB ) 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 EM84530 in stream mode. * This specification are subject to be changed without notice. 6.28.1999 7 EM84530 2-IN-ONE MOUSE CONTROLLER inary m i l e r P m). Status Request ( E9 ) When this command is issued by the system, EM84530 respond with a 3-byte status report as follows: Byte 1 Bit 0 1 2 3 4 5 6 7 0-7 0-7 2 3 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 ) EM84530 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 dots/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 EM84530 2-IN-ONE 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 EM84530 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 ) Reserved ( 0 ) (C) Exiting Microsoft PS/2 mouse mode: There are two ways to exit: a. Power off. b. Reset command (FF). * This specification are subject to be changed without notice. 6.28.1999 9 EM84530 2-IN-ONE MOUSE CONTROLLER ABSOLUTE MAXIMUM RATINGS inary m i l e r P Parameter Ratings Unit Min. 0 -65 -0.3 - Temperature under bias Storage temperature range Supply voltage Power dissipation Max. 70 150 7.5 500 °C °C V mW DC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C) Parameters Sym. Min. Typ. Max. IPL IPh VPI1 VPI2 Vail Vaih Rmi Ixi Vopt Iil 70 0.8 1.5 3.5 18 -18 4.5 0 - 106 1.2 2.1 1.5 56 -56 -1.0 µA µA V V V V µA µA V µA Iih Iosc 0 3 - 1.0 3.6 µA mA Sym. Min. Typ. Max. Unit VDD IOp Vt+ 4.5 3.2 - 5.5 1 3.8 V mA V Vt - 1.2 - 1.9 V Idc Vprl 0.56 - - 1.86 0.4 mA 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 X1,X2,Y1,Y2 low input reference current X1,X2,Y1,Y2 high input reference current X1,X2,Y1,Y2 input current (80µA) X1,X2,Y1,Y2 input current (500µA) L,M,R,OPT input low voltage L,M,R,OPT input high voltage L,M,R input current (Vin=5V) OPT input current OPT high output current (Iopt=20mA) L,M,R,X1,X2,Y1,Y2 input leakage current (Vin=0V) OPT input leakage current (Vin=5V) OSC.OUT Sink current Unit PS/2 mouse mode : (TA=25°C to 70°C) Parameters 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 (VDD=5.4V, RTS=VDD) Operating current (VDD=6.2V, RTS=VDD) RTS operating current (VDD=5.6V, RTS=11V) RTS operating current (VDD=5.4V, RTS=12.5V) RXD high output voltage (Vrh=Vrts-2.6V) RXD low output voltage (Vrl=Vss+2.6V) RTS high input voltage RTS low input voltage * All parameters in above table are compared with VSS * This specification are subject to be changed without notice. 6.28.1999 10 EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr 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 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 Typ. Max. Unit 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 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 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 11 EM84530 2-IN-ONE 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 12 EM84530 2-IN-ONE 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 13 DTR SG DSR RTS RXD TXD 7 8 9 4 5 6 1 2 3 GND +5V CLK DATA 1 2 3 4 5 6 * This specification are subject to be changed without notice. CLK/RTS VDD 8 V SS 16 OSCR EM84530 OSC.OUT 7 OPT 2 6 DATA/RXD 5 1 R M L NC NC X1 X2 Y1 Y2 1KΩ * 50 kΩ must be precise resistor 50K* 5.1V 2 chips analog PT 4 chips digital PT 9 10 11 3 4 12 13 14 15 0.1µF 10µF EM84530 2-IN-ONE MOUSE CONTROLLER inary m i l e r P APPLICATION CIRCUIT 6.28.1999 14