M3005LAB1 M3005LD REMOTE CONTROL TRANSMITTER .. . . . . .. .. FLASHED OR MODULATED TRANSMISSION 7 SUB-SYSTEM ADDRESSES UP TO 64 COMMANDS PER SUB-SYSTEM ADDRESS HIGH-CURRENT REMOTE OUTPUT AT VDD = 6V (– IOH = 80mA) LOW NUMBER OF ADDITIONAL COMPONENTS KEY RELEASE DETECTION BY TOGGLE BITS VERY LOW STAND-BY CURRENT (< 2µA) OPERATIONAL CURRENT < 1mA AT 6V SUPPLY SUPPLY VOLTAGE RANGE 2 TO 6.5V CERAMIC RESONATOR CONTROLLED FREQUENCY (typ. 450kHz) DIP20 (Plastic Package) ORDER CODE : M3005LAB1 SO20 (Plastic Package) ORDER CODE : M3005LD DESCRIPTION The M3005LAB1/M3005LD transmitter IC are designed for infrared remote control systems. It has a total of 448 commands which are divided into 7 sub-system groups with 64 commands each. The sub-system code may be selected by a press button, a slider switch or hard wired. The M3005LAB1/M3005LD generate the pattern for driving the output stage. These patterns are pulse distance coded. The pulses are infrared flashes or modulated. The transmission mode is defined in conjunction with the sub-system address. Modulated pulses allow receivers with narrow-band preamplifiers for improved noise rejection to be used. Flashed pulses require a wide-band preamplifier within the receiver. June 1992 REMO 1 20 VDD SEN 6N 2 19 DRV 6N SEN 5N 3 18 DRV 6N SEN 4N 4 17 DRV 6N SEN 3N 5 16 DRV 6N SEN 2N 6 15 DRV 6N SEN 1N 7 14 DRV 6N SEN 0N 8 13 DRV 6N ADRM 9 12 OSC OUT 10 11 OSC IN VSS 3005L-01.EPS PIN CONNECTIONS 1/10 M3005LAB1 - M3005LD BLOCK DIAGRAM DRV OUTPUTS 0N 1N 2N 3N 4N 5N 6N 0N S 1N E N 2N KEYBOARD SCAN I 3N N P 4N U T S 5N PULSE DISTANCE MODULATOR REMO OUTPUT 6N VDD OSCILLATOR VSS OSCI OSCO INPUTS AND OUTPUTS Key matrix inputs and outputs (DRV0N to DRV6N and SEN0N to SEN6N) The transmitter keyboard is arranged as a scanned matrix. The matrix consists of 7 driver outputs and 7 sense inputs as shown in Figure 1. The driver outputs DRV0N to DRV6N are open drain N-channel tran-sistors and they are conductive in the stand-by mode. The 7 sense inputs (SEN0N to SEN6N) enable the generation of 56 command codes. With 2 external diodes all 64 commands are addressable. The sense inputs have P-channel pull-up transistors so that they are HIGH until they are pulled LOW by connecting them to an output via a key depression to initiate a code transmission. ADDRESS MODE INPUT (ADRM) The sub-system address and the transmission mode are defined by connecting the ADRM input to one or more driver outputs (DRV0N to DRV6N) of the key matrix. If more than one driver is connected to ADRM, they must be decoupled by diode s. This allows the definition of seven sub-system addresses as shown in table 3. If driver DRV6N is connected to ADRM, the data output 2/10 CONTROL LOGIC format of REMO is modulated or if not connected, flashed. The ADRM input has switched pull-up and pulldown loads. In the stand-by mode only the pulldown device is active. Whether ADRM is open (sub-system address 0, flashed mode) or connected to the driver outputs, this input is LOW and will not cause unwanted dissipation. When the transmitter becomes active by pressing a key, the pull-down device is switched off and the pull-up device is switched on, so that the applied driver signals are sensed for the decoding of the sub-system address and the mode of transmission. The arrangement of the sub-system address coding is such that only the driver DRVnM with the highest number (n) defines the sub-system address, e.g. if drivers DRV2N and DRV4N are connected to ADRM, only DRV4N will define the sub-system address. This option can be used in systems requiring more than one sub-system address. The transmitter may be hard-wired for subsystem address 2 by connectingDRV1N to ADRM. If now DRV3N is added to ADRM by a key or a switch, the transmitted sub-system address changes to 4. A change of the sub-system address will not start a transmission. 3005L-02.EPS ADRM M3005LAB1 - M3005LD REMOTE CONTROL SIGNAL OUTPUT (REMO) The REMO signal output stage is a push-pull type. In the HIGH state, a bipolar emitter-follower allows a high output current. The timing of the data output format is listed in tables 1 and 2. The information is defined by the distance tb between the leading edges of the flashed pulses or the first edge of the modulated pulses (see Figure 3). The format of the output data is given in Figures 2 and 3. The data word starts with two toggle bits T1 and T0, followed by three bits for defining the sub-system address S2, S1 and S0, and six bits F, E, D, C, B and A which are defined by the selected key. In the modulated transmission mode the first toggle bit is replaced by a constant reference time bit (REF). This can be used as a reference time for the decoding sequence. The toggle bits function is an indication for the decoder that the next instruction has to be considered as a new command. The codes for the sub-system address and the selected key are given in tables 3 and 4. The REMO output is protected against ”Lock-up”, i.e. the length of an output pulse is limited to < 1ms, even if the oscillator stops during an output pulse. This avoids the rapid discharge of the battery that would otherwise be caused by the continuous activation of the LED. OSCILLATOR INPUT / OUTPUT (OSCI and OSCO) The external components must be connected to these pins when using an oscillator with a ceramic resonator. The oscillator frequency may vary between 350kHz and 600kHz as defined by the resonator. FUNCTIONAL DESCRIPTION Keyboard operation In the stand -by mode all drivers (DRV0N to DRV6N) are on (low impedance to VSS). Whenever a key is pressed, one or more of the sense inputs (SENnN) are tied to ground. This will start the power-up sequence. First the oscillator is activated and after the debounce time tDB (see Figure 4) the output drivers (DRV0N to DRV6N) become active successively. Within the first scan cycle the transmission mode, the applied sub-system address and the selected command code are sensed and loaded into an internal data latch. In contrast to the command code, the sub-system is sensed only within the first scan cycle. If the applied sub-system address is changed while the command key is pressed, the transmitted sub-system address is not altered. In a multiple key stroke sequence (see Figure 5) the command code is always altered in accordance with the sensed key. MULTIPLE KEY-STROKE PROTECTION The keyboard is protected against multiple keystrokes. If more than one key is pressed at the same time, the circuit will not generatea new output at REMO (see Figure 5). In case of a multiple key-stroke, the scan repetition rate is increased to detect the release of a key as soon as possible. There are two restrictions caused by the special structure of the keyboard matrix : - The keys switching to ground (code numbers 7, 15, 23, 31, 39, 47, 55 and 63) and the keys connectedto SEN5N and SEN6N are not covered completely by the multiple key protection. If one sense input is switched to ground, further keys on the same sense line are ignored, i.e. the command code corresponding to ”key to ground” is transmitted. - SEN5N and SEN6N are not protected against multiple keystroke on the same driver line, because this condition has been used for the definition of additional codes (code number 56 to 63). OUTPUT SEQUENCE (data format) The output operation will start when the selected code is found. A burst of pulses, including the latched address and command codes,is generated at the output REMO as long as a key is pressed. The format of the output pulse train is given in Figures 2 and 3. The operation is terminated by releasing the key or if more than one key is pressed at the same time. Once a sequence is started, the transmitted data words will always be completed after the key is released. The toggle bits T0 and T1 are incremented if the key is released for a minimum time tREL (see Figure 4). The toggle bits remain unchanged within a multiple key-stroke sequence. 3/10 M3005LAB1 - M3005LD Table 1 : Pulse Train Timing tP (µs) tM (µs) tW (ms) Flashed 2.53 8.8 - 121 Modulated 2.53 - tOSC 121 Flash Mode Carrier Mode fOSC 455kHz 600kHz tP 4 x tOSC tM 12 x tOSC tOSC 8* Number of Modulation Pulses TO 1152 x tOSC 1536 x tOSC Basic Unit of Pulse Distance tW 55296 x tOSC 73728 x tOSC Word Distance 3005L-01.TBL TO (ms) Flashed Pulse Width N Modulation Period 3005L-02.TBL Mode The following number of pulses may be selected by Metal option : N = 8, 12, 16. Note : The different dividing ratio for TO and tW between flash mode and carrier mode is obtained by changing the modulo of a particular divider from divide by 3 during flash mode to divide by 4 during carrier mode. This allows the use of a 600kHz ceramic resonator during carrier mode to obtain a better noise immunity for the receiver without a significant change in TO and tW. For first samples, the correct divider ration is obtained by a metal mask option. For final parts, this is automatically done together with the selection of flash-/carrier mode. Table 2 : Pulse Train Separation (tb) tb 2 x TO Logic ”1” 3 x TO Toggle Bit Time 2 x TO or 3 x TO Table 3 : Transmission Mode and Sub-system Adress Selection. The sub-system address and the transmission mode are defined by connecting the ADRM input to one or more driver outputs (DRV0N To DRV6N) of the key matrix. If more than one driver is connected to ADRM, they must be decoupled by diodes. Sub-system Address Driver DRVnN for n = # S2 S1 S0 0 1 2 3 4 5 F L A S H E D 0 1 2 3 4 5 6 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 O X X X X X O X X X X O X X X O X X O X O M O D U L A T E D 0 1 2 3 4 5 6 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 O X X X X X O= connected to ADRM blank= not connected to ADRM X = don’t care 4/10 O X X X X O X X X O X X O X O 6 O O O O O O O 3005L-04.TBL Mode 3005L-03.TBL Code Logic ”0” M3005LAB1 - M3005LD Table 4 : Key Codes F E D C B A Matrix Position SEN0N SEN0N SEN0N SEN0N SEN0N SEN0N SEN0N SEN0N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 2 3 4 5 6 7 SEN1N SEN2N SEN3N SEN4N SEN5N SEN6N SEN5N and SEN6N 0 0 0 1 1 1 1 0 1 1 0 0 1 1 1 0 1 0 1 0 1 DRV0N DRV1N DRV2N DRV3N DRV4N DRV5N DRV6N VSS * * * * * * * * ** Code Matrix Sense ** ** ** ** ** * ** 8 to 15 16 to 23 24 to 31 32 to 39 40 to 47 48 to 55 56 to 63 3005L-05.TBL Matrix Drive The complete matrix drive as shown above for SEN0N is also applicable for the matrix sense inputs SEN1N to SEN6N and the combined SEN5/SEN6N. The C, B and A codes are identical to SEN0N as given above. ABSOLUTE MAXIMUM RATINGS Parameter Value Supply Voltage Range Unit - 0.3 to + 7 V VI Input Voltage Range - 0.3 to (VDD + 0.3) V VO Output Voltage Range - 0.3 to (VDD + 0.3) V VDD ±I - I (REMO) M D.C. Current into Any Input or Output Max. 10 mA Peak REMO Output Current during 10µs, Duty Factor = 1% Max. 300 mA Max. 200 mW o Ptot Power Dissipation per Package for TA = - 20 to + 70 C Tstg Storage Temperature Range - 55 to + 150 o C TA Operating Ambient Temperature Range - 20 to + 70 o C 3005L-06.TBL Symbol ELECTRICAL CHARACTERISTICS VSS = 0V, TA = 25oC (unless otherwise specified) Symbol Parameter VDD Supply Voltage IDD Supply Current fOSC Oscill. Frequency Test Conditions Min. o TA = 0 to + 70 C • • Active fOSC = 455kHz REMO,Output unload VDD = 3V VDD = 6V Inactive (stand-by mode) VDD = 6V VDD = 2 to 6.5V (cer resonator) Typ. 2 0.25 1.0 350 Max. Unit 6.5 V 0.5 2 mA mA 2 µA 600 kHz 0.3 x VDD V 100 600 µA µA 1 µA KEYBOARD MATRIX - Inputs SE0N to SEN6N VIL Input Voltage Low VDD = 2 to 6.5V VIH Input Voltage High VDD = 2 to 6.5V - II Input Current VDD = 2V, VI = 0V VDD = 6.5V, VI = 0V Input Leakage Current VDD = 6.5V, VI = VDD II 0.7 x VDD 10 100 V VOL Output Voltage ”ON” VDD = 2V, IO = 0.25mA VDD = 6.5V, IO = 2.5mA 0.3 0.6 V V IO Output Current ”OFF” VDD = 6.5V, VO = 11V 10 µA 5/10 3005L-07.TBL KEYBOARD MATRIX - Outputs DRV0N to DRV6N M3005LAB1 - M3005LD ELECTRICAL CHARACTERISTICS VSS = 0V, TA = 25oC (unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit 0.3 x VDD V CONTROL INPUT ADRM VIL Input Voltage Low VIH Input Voltage High IIL Input Current Low (switched P and N channel pull-up/pull down) Pull-up Act. Oper. Condition, VIN = VSS VDD = 2V VDD = 6.5V 10 100 100 600 µA µA Input Current High (switched P and N channel pull-up/pull down) Pull-down Act. Stand-by Cond.,VIN = VDD VDD = 2V VDD = 6.5V 10 100 100 600 µA µA 60 80 IIH 0.7 x VDD V DATA OUTPUT REMO - IOH Output Current High VDD = 2V, V OH = 0.8V VDD = 6.5V, V OH = 5V IOL Output Current Low VDD = 2V, V OL = 0.4V VDD = 6.5V, V OL = 0.4V tMH/tOSC tOH mA mA 0.6 0.6 Pulse Duty Cycle During Carrier Mode Pulse Length VDD = 6.5V, Oscill. Stopped 0.4 0.5 mA mA 0.6 1 mS 5 7 µA µA 0.7 V II Input Current VDD = 2V VDD = 6.5V, OSC1 at VDD 5 VDD - 0.8 VOH Output Voltage high VDD = 6.5V, - IOL = 0.1mA VOL Output Voltage Low VDD = 6.5V, I OH = 0.1mA V 3005L-08.TBL OSCILLATOR 13 SEN0N 0 15 8 23 16 31 24 39 32 47 40 55 48 63 56 SEN1N SEN2N SEN3N* SEN4N* 16 17 18 DRV6N DRV5N DRV4N DRV3N* 15 19 20 8 7 REMO 6 1 M3005LAB1 M3005LD 5 4 SEN5N 3 SEN6N VD D 10 VSS 2 9 ADRM 11 OSCI 12 OSCO 3005L-03.EPS 7 14 DRV2N* DRV1N DRV0N Figure 1 : Typical Application 6/10 M3005LAB1 - M3005LD Figure 2 : Data Format of REMO Output tW H L bit T1 T0 S2 S1 S0 F E D C B A T1 data 0 1 0 1 0 1 0 0 1 0 0 0 3005L-04.EPS REMO Figure 3 : REMO Output Waveform (a) flashed pulse (b) modulated pulse a) tp tw t MH b) 3005L-05.EPS tM tw Figure 4 : Single Key - Stroke Sequence. Debounce time : tDB = 4 to 9 x TO Start time : tST = 5 to 10 x TO Minimum release time : tREL = TO key bouncing REV t REL closed released new key scan DRVnN off on t DB scan tW REMO scan new word H L OSCO H L 3005L-06.EPS t ST OSCILLATOR ACTIVE 7/10 M3005LAB1 - M3005LD Figure 5 : Multiple Key-Stroke Sequence. Scan rate multiple key-stroke : tSM = 8 to 10 x TO key bouncing key A decoded as HIGH closed KEY A released closed released scan scan off DRVnN on t DB scan t SH tW t ST REMO H L t ST OSCO 8/10 H L word key A t DB word key B word key A OSCILLATOR ACTIVE 3005L-07.EPS KEY B key A decoded as LOW M3005LAB1 - M3005LD I b1 L a1 PACKAGE MECHANICAL DATA 20 PINS - PLASTIC DIP B b e E Z Z e3 D 11 1 10 a1 B b b1 D E e e3 F i L Z Min. 0.254 1.39 Millimeters Typ. Max. 1.65 0.45 0.25 Min. 0.010 0.055 Inches Typ. Max. 0.065 0.018 0.010 25.4 8.5 2.54 22.86 1.000 0.335 0.100 0.900 7.1 3.93 3.3 0.280 0.155 DIP20.TBL Dimensions PM-DIP20.EPS F 20 0.130 1.34 0.053 9/10 M3005LAB1 - M3005LD PACKAGE MECHANICAL DATA 20 PINS - PLASTIC MICROPACKAGE L s b1 e a1 b A a2 C c1 e3 E D M 11 1 10 Dimensions Millimeters Typ. 0.1 0.35 0.23 Max. 2.65 0.2 2.45 0.49 0.32 Min. Inches Typ. 0.004 0.014 0.009 0.5 Max. 0.104 0.008 0.096 0.019 0.013 0.020 45o (typ.) 12.6 10 13.0 10.65 0.496 0.394 1.27 11.43 7.4 0.5 0.510 0.419 0.050 0.450 7.6 1.27 0.75 0.291 0.020 0.300 0.050 0.030 8o (max.) Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 10/10 SO20L.TBL A a1 a2 b b1 C c1 D E e e3 F L M S Min. PM-SO20L.EPS F 20