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| SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER FEATURES * Paired with SM5022IR, SM5033A/AL provides 10-key IR remote control system. * Multi-Key control signal SM5033A/AL provides up to 5 multi-key control signal. * Output signal of single pulse (SP), hold pulse (HP) and cyclic pulse (CP) (only SM5033AL provides 2 CP function) * Oscillator constructed by RC circuit * Custom code prevents interference from other appliance. * High noise immunity PIN ASSIGNMENTS Vss RXIN HP1 HP2 HP3 HP4 HP5 SP5 Vcc OSC CODE2 CODE3 SM5033A SP1 SP2 SP3 SP4 Vss RXIN HP1 Vcc OSC CODE2 APPLICATION Remote control for TV, Hi-Fi, Toy and VCR HP2 HP3 HP4 HP5 CP2 SM5033AL CODE3 SP1 SP2 SP3 CP1 BLOCK DIAGRAM Vcc Vss HP1 HP2 HP3 HP4 HP5 OSC OSC CP2 OUTPUT BUFFER CP1 SP5 RXIN DIGITAL FILTER SHIFT REGISTER SP4 SP3 SP2 SP1 CODE2 CODE1 Page 1 V.1.0 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER PIN DESCRIPTION Pin Number SM5033A SM5033AL 1 2 3~7 8~9 8 ~ 12 13 14 15 16 10 ~ 12 Symbol VSS RXIN HP1 ~ HP5 CP1 ~ CP2 SP1 ~ SP5 CODE2 CODE3 OSC VCC I/O I O O O I I I/O - Description Negative Power Supply Remote signal in HP Control signal output CP Control signal output SP Control signal output Custom code setting RC oscillating circuit input port Positive Power Supply FUNCTION DESCRIPTION (1) Oscillating Circuit A stable oscillator is constructed by parallely connecting R and C between the built-in oscillating circuit and VSS. OSC OSC C R + R : 39K _ 5% + C : 1000P _ 5% Figure 1 Page 2 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER (2) IR/RF Receiving A Schmitt circuit for shaping receiving signal waveform is built-in to eliminate rounding. RXIN 2 IR/RF RECEIVING MODULE Figure 2 (3) Receiving Signal checking The receiving signal is checked by means of storing the 1st frame of transmitting signal in a 12-bit shift register and then, when the second frame data is put into the shift register, 1st frame data in the shift register is forced out by ont bit. This bit is compared with the incoming bit to determine whether the receiving signal is correct or not. 12 BITS 12 BITS RECEIVING SIGNAL FIRST DATA SECOND DATA Figure 3 (4) Custom Code C1, C2 and C3 provide custom code setting. When coding of transmitter and receiver is the same, internal latch strobe pulse is generated to latch received data and output is effected. Page 3 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER (5) Output Signal (a) SP1~SP5 (Single pulse) Transmitter key pressed 12 BITS 12 BITS Received signal Latch strobe pulse Single shot output 107 mSEC Figure 4 (b) HP1~HP5 (Hold Pulse) Transmitter key pressed 12 BITS 12 BITS Received signal Latch strobe pulse Hold pulse output 160 mSEC Figure 5 HP signal is specially used in volume control. Multi-key signal generated by HP key can be used in REC-PLAY, REC-PAUSE and CUE/REVIEW function. (C) CP1, CP2 (Cyclic Pulse) Transmitter key pressed Received signal Latch strobe pulse Cyclic pulse output 12 BITS 12 BITS Figure 6 Cyclic pulse signal is specially used for ON/OFF, MUTE control. Page 4 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER (6) Code Allocation Key no. of SM5022 1 2 3 4 5 6 7 8 9 10 11 17 18 Data Bit T1 T2 T3 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 K1 K2 K3 K4 K5 K6 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 Output signal SM5033A and SM5033B Continuous Signal HP1 Continuous Signal HP2 Continuous Signal HP3 Continuous Signal HP4 Continuous Signal HP5 Continuous Signal HP6 Single shot signal SP1 Single shot signal SP2 Single shot signal SP3 Single shot signal SP4 Single shot signal SP5 Cyclic signal Cyclic signal CP1 CP2 Page 5 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER (7) Custom code setting (a) SM5022/SM5033A code setting Example : Vcc T3 CODE T2 T1 K6 Vcc OSC C2 C3 SM5022 (CODE C1=1, C2=1, C3=0) SM5033A (CODE C2=1, C3=0) SM5022 C1 1 1 1 C2 0 1 1 Figure 7 C3 1 0 1 SM5033A C2 0 1 1 C3 1 0 1 Code set SM5022 uses connecting diode to set ' 1 ', opens the circuit to set ' 0 '. SM5033A uses connecting a 1000P capacitor to ground to set ' 1 ', direct short to ground to set ' 0 '. C1 in SM5033A is internally set to ' 1 '. Page 6 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER ABSOLUTE MAXIMUM RATING (Ta = 25 J ) Parameter Supply Voltage I/O Voltage Power Dissipation Operating Temperature Storage Temperature Symbol Vcc Vin Pd Topr Tstg Rating 6.5 Vss-0.5 TO Vcc+0.5 200 0~+70 -40~+125 J Unit V V mW J DC Characteristic (Unless specified, Vcc=5V, Ta= 25 J ) Parameter Supply Voltage Supply Current Oscillating Frequency Symbol Vcc Icc fosc Vcc=4.5-6.0V Ta= -10 - 70 J Condition Min. 1.5 27 Type Max. 6.0 1.0 57 Unit V mA KHz Standard OSC Frequency Output Current "H" level "L" level Input Current Pull-up resistor IR Input threshold Voltage Hysteresis width "H" level sfosc IOH IOL IIH Rup VIV VHIS RXIN terminal RXIN terminal VOH=4V VOL=1V VIH=5V 1.0 -1.0 10 2.0 - 38 20 2.5 0.6 -1.0 1.0 40 3.0 - KHz mA mA mA K V V Page 7 VER 1.0,NOV. 2000 SM5033A/AL SAMHOP Microelectronics Corp. IR DEODER APPLICATION CIRCUIT Vcc Vss RXIN HP1 SIGNAL CONTROL OUTPUT HP2 Vcc OSC C2 C3 39K Vcc=5V 1000p SM5033B HP3 HP4 HP5 CP2/SP5 SP1 CONTROL SIGNAL OUTPUT SP2 SP3 SP4/CP1 C1=1 C2=0 Vcc Vss Page 8 VER 1.0,NOV. 2000 |
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