SC9244 REMOTE CONTROL TRANSMITTER OF 9012 CODE FORMAT DESCRIPTION SC9244 is an infrared remote control transmitter utilizing CMOS Technology specially designed for infrared remote control system. It provides 16 selectable system code, and 14 selectable data code. The circuit has SOP20 and SOP24 two kind of package. The pin assignments SOP-20-300-1.27 and application circuit are optimized for easy PCB Layout and cost saving advantage. FEATURES * CMOS Technology SOP-24-375-1.27 * Low Power Consumption (<1µA) * System code and data code selectable * Internal 38KHz carrier, used for infrared transmitting APPLICATIONS ORDERING INFORMATION Device Package * Infrared transmitting remote controller SC9244 SOP-20-300-1.27 * TV remote controller SC9244A SOP-24-375-1.27 * Video Recorder remote controller * VCD audio remote controller BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 1 of 11 SC9244 ABSOLUTE MAXIMUM RATING Characteristics Symbol Ratings Unit Operating Voltage VDD -0.3 7.0 V Input Voltage VIN VSS-0.3 VDD+0.3 V Operating Temperature Tamb -40 85 °C Storage Temperature Tstg -65 150 °C DC ELECTRICAL CHARACTERISTICS VDD=3.0V±10% VSS=0 Characteristics High Level Output Voltage Low Level Output Voltage High Level Output Driving Current Low Level Output Driving Current High Level Input Voltage Low Level Input Voltage Dynamic Power Dissipation Quiescent Power Dissipation Pull-up Resistor Test conditions Symbol Pin Min. Typ. Max. Unit Iload=-0.8mA VDD-0.5 - - V Iload=0.8mA - 0.1 0.5 V VOH=2V 2 3 - mA VOL=1V 3 5 Conditions PA7 PA0 VOH PB7 PB0 IROUT PA7 PA0 VOL PB7 PB0 IROUT PA7 PA0 IOH PB7 PB0 IROUT PA7 PA0 IOL PB7 PB0 IROUT VIH VIL PA7 PA0 PB7 PB0 PA7 PA0 PB7 PB0 Iddd VDD Idds VDD Rup PA7 PA0 0.7VDD VDD V 0 0.2VDD V 0.5 1 mA 0.2 1 µA 200 KΩ Main oscillator 455KHz Oscillator stops HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn mA 150 REV:1.0 2006.04.24 Page 2 of 11 SC9244 PIN CONFIGURATION PIN DESCRIPTIONS Pin no. Pin name I/O 1 OSCI I Oscillator input pin 2 2 OSCO O Oscillator output pin 3 3 GND -- Ground 4~11 4~11 PB0~PB7 O Key scan signal output pin 12 12 IROUT O Infrared transmitting output pin 15~16 -- PA0~PA1 I 17~20 14~17 PA2~PA5 I Key scan signal input pin 22 18 VDD -- Positive power supply 23~24 19~20 PA6~PA7 I Key scan signal input pin SOP24 SOP20 1 Functions Key scan signal input pin, when in SOP20 package, do not have these two pins FUNCTION DESCRIPTIONS 1. OSCILLATOR CIRCUIT There is a ceramic oscillator between OSCI and OSCO, and a 100pF capacitor whose capacitance is 455KHz between two oscillator pins and GND. To reduce the power dissipation, the oscillator circuit will work when press the key, or else it stops. It can generate 38KHz carrier by internal frequency division. FIR=455KHz/12=37.92KHz Duty=1/3 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 3 of 11 SC9244 2. CODE TRANSMISSION The transmitting code includes a lead code, 16-bit system code, 8-bit data code and 8-bit b1s complement of data code. The lead code is composed of 4.5ms high level and 4.5ms low level, thus 9ms in total, and it is used as the leader for the following codes. Thus, when reception is configured by a microcomputer, it will time the various operations such as decoding. The code uses the PPM (Pulse Phase Modulation) Method, with “0”and “1” differentiated by the time between pulses. 3. REMOTE OUTPUT WAVEFORM DOUT Output waveform Press the key About 38ms Data transmission waveform about 108ms Successive transmission waveform about 108ms Data transmission waveform Lead code System code 9ms 17.92ms~36ms 0 4.5ms 1 27ms 1 4.5ms 9ms 1.125ms 2.25ms 0.56ms Successive transmission waveform 4.5ms 4.5ms 0 1 0.56ms 0.56ms 9ms Carrier waveform B1s complement of key data code Key data code System code 2.25ms When S0( System code BIT0)=0, this bit transmits 1 2/3 1/3 38KHz When oscillation frequency is 455 KHz, the output signal is modulated by 38 KHz of duty 1/3 (which is 1/12 of the carrier generation circuit). Note: In designing the firmware of the receiving and decoding circuit, please strictly follow the following instructions: 1) System Codes: The same code is transmitted twice and therefore, and then decodes system codes for two times and check if they are in agreement with each other. 2) Key Data Codes: The Key Data Code and its inversed code are always transmitted together, therefore, check if they are in agreement with each other. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 4 of 11 SC9244 4. ACHIEVEMENT SELECTION CIRCUIT As the following picture, S1, S2, S3, and S4 are the selection bits of system code; S5, S6, S7, and S8 are selecting bits of data code. 5. SYSTEM CODE TABLE Priority S4 S3 S2 S1 System code 1 0 0 0 0 0EH 2 0 0 0 1 1EH 3 0 0 1 0 2EH 4 0 1 0 0 3EH 5 1 0 0 0 17H 6 0 0 1 1 18H 7 0 1 0 1 19H 8 0 1 1 0 1AH 9 1 0 0 1 1BH 10 1 0 1 0 1CH 11 1 1 0 0 1DH 12 0 1 1 1 1FH 13 1 0 1 1 20H 14 1 1 0 1 21H 15 1 1 1 0 22H 16 1 1 1 1 23H Note: Si=1 denotes press the key, Si=0 denotes open. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 5 of 11 SC9244 6. DATA CODE TABLE No. Keyboard DATA CODE(Next row shows the value of S8~S5) 00 01 02 04 08 03 05 06 K1 PB0 00 K2 PB1 01 K3 PB2 02 PB3 03 K5 PB4 04 K6 PB5 05 K7 PB6 06 K8 PB7 07 K9 PB0 08 K10 PB1 09 K11 PB2 0A PB3 0B K13 PB4 0C K14 PB5 0D K15 PB6 0E K16 PB7 0F K17 PB0 10 K18 PB1 11 K19 PB2 12 PB3 13 K21 PB4 14 K22 PB5 15 K23 PB6 16 K24 PB7 17 K25 PB0 18 K26 PB1 19 K27 PB2 1A PB3 1B K29 PB4 1C K30 PB5 1D K31 PB6 1E K32 PB7 1F K4 K12 K20 K28 PA7 PA6 PA5 PA4 09 0A 0C 07 0B 0D (To be continued HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 6 of 11 SC9244 (Continued) No. Keyboard DATA CODE(Next row shows the value of S8~S5) 00 01 02 04 08 03 05 06 09 0A 0C 07 0B 0D K33 PB0 40 20 30 50 60 70 80 90 A0 B0 C0 D0 E0 F0 K34 PB1 41 21 31 51 61 71 81 91 A1 B1 C1 D1 E1 F1 K35 PB2 42 22 32 52 62 72 82 92 A2 B2 C2 D2 E2 F2 PB3 43 23 33 53 63 73 83 93 A3 B3 C3 D3 E3 F3 K37 PB4 44 24 34 54 64 74 84 94 A4 B4 C4 D4 E4 F4 K38 PB5 45 25 35 55 65 75 85 95 A5 B5 C5 D5 E5 F5 K39 PB6 46 26 36 56 66 76 86 96 A6 B6 C6 D6 E6 F6 K40 PB7 47 27 37 57 67 77 87 97 A7 B7 C7 D7 E7 F7 K41 PB0 48 28 38 58 68 78 88 98 A8 B8 C8 D8 E8 F8 K42 PB1 49 29 39 59 69 79 89 99 A9 B9 C9 D9 E9 F9 K43 PB2 4A 2A 3A 5A 6A 7A 8A 9A AA BA CA DA EA FA PB3 4B 2B 3B 5B 6B 7B 8B 9B AB BB CB DB EB FB K45 PB4 4C 2C 3C 5C 6C 7C 8C 9C AC BC CC DC EC FC K46 PB5 4D 2D 3D 5D 6D 7D 8D 9D AD BD CD DD ED FD K47 PB6 4E 2E 3E 5E 6E 7E 8E 9E AE BE CE DE EE FE K48 PB7 4F 2F 3F 5F 6F 7F 8F 9F AF BF CF DF EF FF K49 PB0 50 30 40 60 70 80 90 A0 B0 C0 D0 E0 F0 00 K50 PB1 51 31 41 61 71 81 91 A1 B1 C1 D1 E1 F1 01 K51 PB2 52 32 42 62 72 82 92 A2 B2 C2 D2 E2 F2 02 PB3 53 33 43 63 73 83 93 A3 B3 C3 D3 E3 F3 03 K53 PB4 54 34 44 64 74 84 94 A4 B4 C4 D4 E4 F4 04 K54 PB5 55 35 45 65 75 85 95 A5 B5 C5 D5 E5 F5 05 K55 PB6 56 36 46 66 76 86 96 A6 B6 C6 D6 E6 F6 06 K56 PB7 57 37 47 67 77 87 97 A7 B7 C7 D7 E7 F7 07 K57 PB0 58 38 48 68 78 88 98 A8 B8 C8 D8 E8 F8 08 K58 PB1 59 39 49 69 79 89 99 A9 B9 C9 D9 E9 F9 09 K59 PB2 5A 3A 4A 6A 7A 8A 9A AA BA CA DA EA FA 0A PB3 5B 3B 4B 6B 7B 8B 9B AB BB CB DB EB FB 0B K61 PB4 5C 3C 4C 6C 7C 8C 9C AC BC CC DC EC FC 0C K62 PB5 5D 3D 4D 6D 7D 8D 9D AD BD CD DD ED FD 0D K63 PB6 5E 3E 4E 6E 7E 8E 9E AE BE CE DE EE FE 0E K64 PB7 5F 3F 4F 6F 7F 8F 9F AF BF CF DF EF FF 0F K36 PA3 K44 K52 PA2 PA1 K60 PA0 Note: Si=1 denotes press the key, Si=0 denotes open. The data in the table is all in hex. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 7 of 11 SC9244 TYPICAL APPLICATION CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 8 of 11 SC9244 PCB WIRE LAYOUT SCHEMATIC Note: The above IC only use to hint, not to specify. Panel layout Notice: * In wire layout, the power filter capacitor should near to IC. * In wire layout, should avoid power line and ground line too long. * Recommended infrared transmit unit and IC ground line should layout separated, or overstriking lines. * The emitter of triode connect 1Ω resistor at least. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 9 of 11 SC9244 PACKAGE OUTLINE SOP-20-300-1.27 UNIT: mm 0.15±0.05 1.27 2.25MAX 0.45 12.70±0.25 11.43 SOP-24-375-1.27 UNIT: mm 0.25±0.05 1.27 0.40 3.10MAX 15.34±0.25 13.97 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 10 of 11 SC9244 HANDLING MOS DEVICES: Electrostatic charges can exist in many things. All of our MOS devices are internally protected against electrostatic discharge but they can be damaged if the following precautions are not taken: • Persons at a work bench should be earthed via a wrist strap. • Equipment cases should be earthed. • All tools used during assembly, including soldering tools and solder baths, must be earthed. • MOS devices should be packed for dispatch in antistatic/conductive containers. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2006.04.24 Page 11 of 11