MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [FEATURES] This IC is 1 chip driver IC for spindle motor and 4 channel actuators. All of the motor and actuator of optical disk drive system (CD-ROM etc.) can be drived by only this IC. This IC has current control drive system for Focus, Tracking, Spindle and Slide channel drive, also has a direct PWM control system for Spindle and Slide channels drive due to reducing IC power dissipation. This IC has three voltage supply terminals (for Spindle, Slide/Loading and Focus/Tracking) , and these voltage supply can be set separately. Further more this IC has an operational amplifier for Slide input, FG amplifier, thermal shut down circuit, standby circuit, channel select function, reverse rotation detect circuit and Short braking select. PIN CONFIGURATION LOIN+ MU1 MU2 VM23 LO+ LOGND RSL (Top View) 42 41 1 2 3 4 40 39 5 38 6 37 7 36 35 8 SL+ SLGND W V 9 10 34 11 32 31 U RSP HWHW+ HVHV+ 14 15 29 28 16 17 27 18 25 19 24 HUHU+ 20 23 21 22 [APPLICATION] 33 12 13 30 26 LOINRFO RTO 5VCC VM4 TOTO+ FO+ FOGND SLIN OPINOSC GND FOIN TOIN SPIN REF FG HB VM1 Package outline : 42 PIN POWER SSOP (42P9R-B) CD-ROM, DVD, DVD-ROM, DVD-RAM ,Optical disc related system,etc [BLOCK DIAGRAM] s FG FG s s s Reverse Detect HU+ HUHV+ Spindle HV- Loading Slide HW+ HWHB 5VCC 5Vpower supply Hall Bias CTL amp. SPIN CTL amp. Current comp. Current comp. LOIN+ LOIN- Direction comp. Direction comp. REF TSD BIAS TOIN FOIN Frequency generator Regulator MU1 MU2 OSC OPIN- Focus Tracking + 5VCC s s (1 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [PIN FUNCTION] TERMINAL SYMBOL TERMINAL TERMINAL FUNCTION SYMBOL TERMINAL FUNCTION 1 LOIN+ Loading control input(+) 42 LOIN- 2 MU1 mute 1 41 RFO 3 MU2 mute 2 40 RTO 4 VM23 39 5VCC 5 LO+ Loading non-inverted output 38 VM4 Motor Power Suppry 4(for FS and TS) 6 LO- Loading inverted output 37 TO- Tracking inverted output 7 GND GND 36 TO+ Tracking non-inverted output 8 RSL Slide current sense 35 FO+ Focus non-inverted output 9 SL+ Slide non-inverted output 34 FO- Focus inverted output 10 SL- Slide inverted output 33 GND GND 11 GND GND 32 SLIN 31 OPIN- Motor Power Suppry 3(for Slide/Loading) Loading control input(-) Current feedback terminal for Focus Current feedback terminal for Tracking 5V Power Suppry Slide control input 12 W 13 V Motor drive output V 30 OSC PWM carrier oscilation set 14 U Motor drive output U 29 GND GND 15 RSP Spindle current sensie 28 FOIN Focus control voltage input 16 HW- HW- sensor amp. input 27 TOIN Tracking control voltage input 17 HW+ HW+ sensor amp. input 26 SPIN Spindle control voltage input 18 HV- HV- sensor amp. input 25 REF Reference voltage input 19 HV+ HV+ sensor amp. input 24 FG Frequency generator output 20 HU- HU- sensor amp. input 23 HB Bias for Hall Sensor 21 HU+ HU+ sensor amp. input 22 VM1 Motor Power Suppry 1(for Spindle) Motor drive output W (2 / 17) Operational amplifier imverted input REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [ABSOLUTE MAXIMUM RATING] SYMBOL PARAMETER 5VCC 5V power supply VM1 VM23 VM4 (Ta=25ºC) CONDITIONS RATING Unit 7 V Motor power supply 1 Spindle power supply 15 V Motor power supply 23 Slide and Loading power supply 15 V Motor power supply 4 15 V IoA Motor Output Current A Focus and Tracking power supply Spindle and Slide output current with external shottky diode *note 1 1.2 A IoB Motor Output Current B Focus,Tracking and Loading output current *note 1 1.0 A 0 to 5VCC V 2.6 W 20.8 mW / ºC Vin Pt Maximum input voltage of terminals MU1,MU2,Hw-,Hw+,Hv-,Hv+,Hu-,Hu+,REF, SPIN,TOIN,FOIN,OSC,OPIN-,LOIN-,LOIN+ Power dissipation Free Air and on the grass epoxy board Kθ Thermal derating Free Air and on the grass epoxy board Tj Junction temperature 150 ºC Operating temperature -20 to +75 ºC Storage temperature -40 to +150 ºC Topr Tstg *note1 ; The ICs must be operated within the Pt (power dissipation) or the area of safety operation The spindle and slide output terminal is needed external shottky diode between each output and GND when it is used above 0.6A. Discription(IoA) is case of with external shottky diode. [RECOMMENDED OPERATING CONDITIONS] (Ta=25ºC ) LIMITS SYMBOL VM1 VM23 VM4 PARAMETER VM1 power supply(for Spindle) VM23 power supply(for Slide and Loading) VM4 power supply(for Focus and Tracking) IoA Spindle and Slide Output Current IoB Focus, Tracking and Loading Output Current Fosc Motor power supply 2 minimum typical maximum Unit 6 12 13.2 V 4.5 12 13.2 V 4.5 5 13.2 V 0.5 1.0 A 0.5 0.8 A 120 KHz *note2 30 *note2 The spindle and slide output terminal is needed external shottky diode between each output and GND when it is used above 0.6A. Discription(IoA) is case of with external shottky diode. ( 3 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [THERMAL DERATING] 6.0 (W) 5.0 This IC's package is POWER-SSOP, so improving the board on which the IC is mounted enables a large power dissipation without a heat sink. For example, using an 1 layer glass epoxy resin board, the IC's power dissipation is 2.6W at least. And it comes to 3.6W by using an improved 2 layer board. The information of the N, P type board is shown in attached. 3.6W using N-type board 4.0 2.6W using P-type board 3.0 2.0 1.0 0 25 50 75 Ambient Temperature 100 125 150 Ta (ºC) [ELECTRICAL CHARACTERISTICS] Common (Ta=25ºC, 5VCC=VM4=5V,VM1=VM23=12V unless otherwise noted.) LIMITS SYMBOL Icc1 Icc2 Fosc VinOP IinOP VofOP VoutOP VinREF PARAMETER Supply current Sleep current MIN 5VCC,VM1, VM23, VM4 current OPIN- OPamp input current OPIN-=1.65V -1.0 OPamp input offset voltage REF=1.65V(OPIN-=OPOUT ;buffer) OPamp output voltage range Io=-2.0 to +2.0mA VMUHI MUTE terminal high voltage Mute terminal input current 60 78 mA 30 µA 0 REF input voltage range MUTE terminal low voltage Unit VREF=1.65V 5 V 0 µA -10 +10 mV 0.5 4.5 V 1.0 3.3 V -10 +10 µA 0.8 V MU1,MU2 -0.15 3.0 MU1,MU2 MU1,MU2 KHz 110 OPamp input voltage range VMULO MAX (MU1 = MU2 =0V) OSC : with 180pF REF input voltage range TYP 5VCC,VM1, VM23, VM4 current under Sleep PWM carrier frequency IinREF IMU CONDITIONS at 5V input voltage ( 4 / 17) V 500 µA REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [ELECTRICAL CHARACTERISTICS] Spindle (Ta=25ºC, 5VCC=VM4=5V,VM1=VM23=12V unless otherwise noted.) LIMITS SYMBOL Vdyc1 Dynamic range of output Vin1 Gvo1 Vlim1F Vlim1R VHcom Control voltage dead zone 1 Control gain 1 Control limit 1F Control limit 1R 10.3 10.8 [REVERSE] -80 -40 0 mV [FORWARD] 0 +40 +80 mV 5 V 0 Gio1=Gvo1/ Rs [A/V] V 0.85 1.0 1.15 V/V Ilim1F=Vlim1F/ Rs [A] [FORWARD] 0.4 0.5 0.6 V Ilim1R=Vlim1R/ Rs [A] [REVERSE] 0.27 0.34 0.41 V 3.7 V Hu+,Hu-,Hv+,Hv-,Hw+ ,Hw- 1.3 Hu+,Hu-,Hv+,Hv-,Hw+ ,Hw- 60 HB output voltage at Load current (IHB)=10mA 0.6 HB terminal sink current MU1=MU2=0V or MU1=MU2=5V or MU1=5V/MU2=0V Hall sensor amp. common mode input range Hall sensor amp.input signal level IHB TYP Control voltage input range 1 SPIN VHmin VHB REF<SPIN MAX Unit MIN Io=0.5 [A] SPIN<REF Vdead1Vdead1+ CONDITIONS PARAMETER Slide mVp-p 0.85 1.2 V 30 mA (Ta=25ºC, 5VCC=VM4=5V,VM1=VM23=12V unless otherwise noted.) LIMITS SYMBOL Vdyc2 CONDITIONS PARAMETER Dynamic range of output Io=0.5 [A] MIN TYP at VM23=5[V] 3.3 3.8 at VM23=12[V] 10.3 10.8 MAX Unit V Vdead2- SLIN < REF -80 -40 0 mV Vdead2+ Control voltage dead zone 2 REF < SLIN 0 +40 +80 mV SLIN 0 5 V Vin2 Gvo2 Vlim2 Tdon Tdoff Tdsw Ileak Control voltage input range 2 Gio2=Gvo2/ Rs [A/V] 0.85 1.0 1.15 V/V Ilim2=Vlim2/ Rs [A] 0.43 0.5 0.58 V Output turn-on delay 1.0 2.0 µsec Output turn-off delay 3.5 7.0 µsec Output switching delay 5.0 10.0 µsec 100 µA Control gain 2 Control limit 2 Output leak current MU1=MU2=5v,MU1=MU2=0v ( 5 / 17) -100 REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER [ELECTRICAL CHARACTERISTICS] Loading (Ta=25ºC 5VCC=VM4=5V,VM1=VM23=12V unless otherwise noted.) LIMITS SYMBOL Vdyc3 Vin3 Gvo3 Voff1 PARAMETER Dynamic range of output Control voltage input range3 Control gain 3 Output offset voltage CONDITIONS Io=0.5[A] MIN TYP VM23=5[V] 3.3 3.8 VM23=12[V] 10.3 10.8 (LO+) - (LO-) (LOIN+) - (LOIN-) LOIN+=LOIN-=5V Unit V 0 LOIN+,LOIN- MAX 5 V 16.6 18 19.3 dB -100 0 +100 mV -50 0 +50 mV (LO+) - (LO-) LOIN+=LOIN-=1.65V Focus / Tracking (Ta=25ºC, 5VCC=VM4=5V,VM1=VM23=12V unless otherwise noted.) LIMITS SYMBOL PARAMETER Vdyc4 Dynamic range of output Vin4 Gvo4 Voff2 Control voltage input range 4 CONDITIONS Io=0.5[A] VM1=12[V] MIN TYP VM4=5[V] 3.8 4.2 VM4=12[V] 6.8 7.6 Control gain 4 RFO (RTO)-FO-(TO-) FOIN(TOIN)-REF Output offset voltage RFO (RTO)-FO-(TO-) at REF=FOIN(TOIN)=1.65V Unit V 0 FOIN,TOIN MAX 5 V -6.7 -8.0 -9.4 dB -5 0 +5 mV [THERMAL CHARACTERISTICS] FUNCTION START TEMPERATURE OF IC SYMBOL Unit MIN TSD FUNCTION STOP TEMPERATURE OF IC PARAMETER Thermal Shut Down TYP MAX 160 ( 6 / MIN TYP 130 17) MAX ºC REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER Channel select function Logic control MU1 MU2 Loading Slide SELECT4 H H On On SELECT3 L H On Off SELECT2 H L On On SELECT1 L L Off Off Brake select Drive channel Focus Tracking Spindle Opamp (SPIN<REF) On On On On Short On On On On Short On On On On PWM Off Off Off Off -- This IC has two MUTE terminal (MU1 and MU2). It is possible to control ON / OFF of each channel by external logic inputs. It has four kinds of function for select.In case of SELECT1, the bias of all circuit becomes OFF. Therefore, this mode is available in order to reduce the power dissipation when the waiting mode. In case of SELECT2,it is possible to select the PWM reverse braking to take the brake of Spindle motor. Also,in case of SELECT4,it is possible to select the short braking when in the same. In case of SELECT3,it is possible to do OFF the slide channel. Regard with making OFF the loading channel in case of SELECT2,SELECT3 and SELECT4,please refer to [Loading channel]. Loading channel The loading channel is the circuit of BTL voltage drive. This circuit has the referential input. Output swing is determined with DVin X 8. Also,it is possible for this channel to use for the slide motor , the focus coil and the tracking coil. The input terminal is high impedance. It is possible to do variable a gain by external resistor. The output becomes high impedance in case of both input voltage becomes under 0.5 volts. It is possible for the input terminal to operate from 0 volts.The following table and diagram show an application in case of two MCU port and one MCU port for the loading motor.In case of one MCU port, if use three state port, it is possible for this channel to have the stop function. VM23 LO+ Forward LOIN+ + LOADING Channel Vo M - LOINLO- ( 7 / 17) Reverse REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER LO- LO+ Output voltage [V] + Coil - VM23 2 [LOIN+]– [LOIN-] (V) Vo Coil Gvo = 8 [v/v] Vo=[LO+]–[LO-] =8 x ([LOIN+]–[LOIN-]) LO- LO+ application.1 (MCU :Two port H/L control) Logic control P1 P2 5V 5V 5V 0 5V 0 0 0 Situation of loading channel Output voltage swing Short brake --> Stop Reverse rotation Forward rotation Off [ High impedance output] Vo= 0 [V] Vo= - 8x5xR1/(R1+2xR2) Vo= 8x5xR1/(R1+2xR2) Off application.2 (MCU :One port H/Z/L control) Logic control Situation of loading channel P1 5V Forward rotation Z (Hi impedance) Short brake --> Stop 0V Reverse rotation Output voltage swing Vo= - 2.5[V] x8x R2 (R1/2)+R2+R3 Vo= 0 [V] Vo= - 2.5[V] x8x R2 (R1/2)+R2+R3 P1 5v P1 R2 P1 0v R1 LOIN+ 5v P2 5V 5v Z R1 LOIN+ 0v P1 0v R3 LOINR2 application.1 ( Two port H/L control) P2 R2 R1 LOIN- application.2 (One port H/Z/L control) ( 8 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER SPINDLE channel Forward Torque current limit The relationship between the differential voltage between SPIN and REF and the torque is shown in right Figure. The voltage gain[Gvo] is 1.0 [V/V]. The current gain[Gio] is 2.0A/V (at sensing resistor : 0.5 ohm,and R1=∞,R2=0ohm) in forward torque directions, and the dead zone is from 0mV to 80mV (at R1=∞,R2=0ohm) . The coil current gain under the reverse torque is the same with in forward torque directions.And the limitation function gets on when the differential voltage of VM1(12V) to RSP is 0.5V at forward and 0.3V at reverse. Therefore current-gain-control and current-limit of this IC is determined with sensing resister value, and more detail control can be determined with setting a gain-resister outer this IC as below. lim1F Dead zone Gio CTL -REF (V) Gio Dead zone lim1R current limit Reverse Torque The example of current-gain and current-limit of SPINDLE. Rs [W] Ilim1F Ilim1R [A] [A] Gio* [A/V] R1=R2 R1=∞ R2=0 ohm R1=2•R2 0.50 1.00 0.68 2.00 1.00 0.66 0.75 0.66 0.45 1.33 0.66 0.44 1.00 0.50 0.34 1.00 0.50 0.33 Gio*= R1 / [(R1+R2)•Rs] [A/V] VM1 5V Rh Rs RSP HB HU+ HUHV+ HVHW+ HWU V W R2 SPIN CTL R1 1.65v REF M GND (9 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER SLIDE channel The relationship between the differential voltage between SLIN and REF and the torque is shown in right Figure. The voltage gain[Gvo] is 1.0 [V/V]. The current gain is 2.0A/V (at sensing resistor : 0.5 ohm and R1=R2) in forward torque directions, and the dead zone is from 0mV to 60mV (at R1=R2=16kohm). The coil current gain under the reverse torque is the same with in forward torque directions.And the limitation function gets on when the differential voltage of VM23(12V) to RSL is 0.5V. Therefore current-gain-control and current-limit of this IC is determined with sensing resister value.In the input part,built-in an inverted amplifier. It is possible to control more detail by setting external circuit. Forward current limit Gio Dead zone Dead zone CTL -REF (V) Gio current limit Reverse VM23 SLIN Rs R1 RSL SLIN R2 Forward SL+ CTL OPIN- OPIN- SLIN M 2K C1 R2 + R1 SL- 10K GND REF CTL Reverse OPIN- The example of current-gain and current-limit of SLIDE. Gio* [A/V] Rs [Ω] Ilim [A] R1=R2 2•R1=R2 0.50 1.00 2.00 1.00 0.75 0.66 1.33 0.66 1.00 0.50 1.00 0.50 Gio*= R1 / R2•Rs [A/V] (10 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER FOCUS / TRACKING channel The focus and tracking channel is the current feedback control drive of MITSUBISHI original.The focus and tracking is the same composition. The relationship between the differential voltage between FOIN and REF and the output current is shown in right Figure. The voltage gain is 0.4 [V/V].Therefore, the current gain is 0.8[A/V] in case of the sensing resistor is 0.5 ohm. The maximum range of output swing is limited around 7.5 volts,in case of VM4 is above 10 volts. 2.5R FOIN R FO- Rs R REF 2.5R R RFO Coil VM4 R R FO+ R + Coil current [A] 0 IL=Vrs / Rs FOIN– REF (V) IL Gio=1.0A/V at Rs=0.33 ohm Output voltage [V] FORs RFO Vrs FO+ Vrs=(RFO–[FO-]) =0.4 x (FOIN–REF) + Coil - VM4 2 FOIN– REF (V) Vcoil Coil RFO Rs FO- FO+ (11 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER Direct PWM operation The spindle and the slide channel is controlled by the direct PWM control. Also,built-in the current limit circuit. This IC controls the motor current directly. FORWARD Current path timing 1. FORWARD Current path timing 2. VM23 VM23 Rs Rs RSL RSL Current path 1 SL+ SL- M SL+ M SL- GND GND Current path 2 Current path 1 Control value Io=Vrs / Rs Current path 2 Control value Motor current carrier period Time ( 12 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER PWM carrier frequency setting PWM carrier frequency is decided by charging and discharging the capacitor that is connected to OSC terminal outer IC. Examination of the relationship the capacitor connected to OSC terminal and PWM carrier frequency is given in following table. Capacitor [pF] Carrier Frequency [KHz] 330 220 180 130 110 65 90 110 140 160 *note) This PWM carrier frequency is TYP value. Recommendation of SHORT BRAKE MODE at SPINDLE DRIVE This IC has two brake mode, PWM-BRAKE-MODE and SHORT-BRAKE-MODE. In this IC recommendation, SHORTBRAKE-MODE is superior to PWM-BRAKE-MODE to reducing the power dissipation and to avoid braking down of this IC. (By excessive reverse torque current in braking a motor with PWM-BRAKE from high-speed-rotation with being excessive Back-EMF, this IC could be broken.) The relationship between hall-amplifier-input and output-current-commutation at SPINDLE DRIVE The relationship between the hall elements and the motor output current is shown in bellow Figure. Hw+ Hv+ Hu+ Hall input Hall elements Outer roter W U V V W + Output current V U W U U V V W REVERSE SPIN < REF 0 - U W V U FORWARD SPIN > REF W ( 13 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER FG function at SPINDLE DRIVE The FG terminal outputs the square pulse signal synchronizing with the Hall inputs [Hv+, Hv-] timing. And, the FG terminal is open-collector output. Phase delay circuit at SLIDE Phase delay circuit is built in the IC to detect an output spike current, when the motor current direction is switching. In switching the motor current direction, Phase delay circuit switch-off all output trangister of H-bridge for 3µsec. Output current setting at SLIDE In this IC, since output tranjister is NPN-type tranjister, motor coil current (Io) is larger than sensing resistance current about 20mA (TYP.) according to base current of output tranjister. Therefore please design output current with consisting these base current. ( 14 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER I/O circuit • FOIN, TOIN, SPIN LOIN+, LOINOPIN-, REF • Hu+, HuHv+, HvHw+, Hw- • MU1, MU2 5VCC • OSC 5VCC 2K 5VCC 5VCC 2K 2K 2K 2K 8K 10K 2K 30K • HB • FG • VM1, RSP, U, V, W 5VCC 5VCC VM1 5VCC RSP V U W GND VM1 • VM4, FO+, FO-, TO+, TO- 9V max INSIDE REG VM4 FO+ TO+ FO- TO- GND • VM23, RSL, SL+, SL-, LO+, LOVM23 RSL SL+ SL- LO+ LO- GND ( 15 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER <The boards for thermal derating evaluation> Board material 1st layer [TOP view] 2nd layer [BACK view] Glass-epoxy FR-4 Size 70 x 70mm N-type board thickness t = 1.6mm [2 layer] 1 and 2 layers material : copper O-type board [2 layer] P-type board [1 layer] POWER-SSOP 42P9R-B Heat sink Lead Chip mounted IC Evaluation board ( 16 / 17) REV990607 MITSUBISHI SEMICONDUCTORS Preliminary M63013FP SPINDLE MOTOR AND 4CH ACTUATOR DRIVER <APPLICATION CIRCUIT no.1> MCU 5 to 12V Slide Loading 42 MU1 RFO 41 3 MU2 RTO 40 4 VM23 LO+ 5VCC VM4 39 5 6 TOTO+ 37 7 LOGND SLIDE 8 RSL FO+ 35 M 9 SL+ FO- 34 10 SLGND 12 W V GND SLIN OPIN- 33 11 30 U RSP OSC GND FOIN 28 16 HW- TOIN 27 17 HW+ SPIN 26 18 HV- REF 25 19 HV+ FG 24 20 HUHU+ HB 23 VM1 22 Loading RSL LOIN+ 2 13 RSP M 14 15 21 R9 R10 LOIN- M 1 R9 38 36 5V RTO TS FS RFO 32 31 C2 R7 C1 R8 29 R5 R6 R3 R4 R2 R1 1.65v DSP 10K Rh ( 17 / 6v to 12v *Pull-up Resister 17) REV990607