HCS320/SN Microchip Technology, HCS320/SN Datasheet

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... Microchip Technology Inc. ® Code Hopping Encoder DESCRIPTION The HCS320 from Microchip Technology Inc code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS320 utilizes the code hopping technology which incorporates high security, a small package outline, and low cost, to make this device a perfect solution for unidirectional remote key- less entry systems and access control systems ...

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... A block cipher based on a block length of 32 bits and a key length of 64 bits is used. The algorithm obscures the information in such a way that even if the transmission information (before coding) differs by only one bit from that of the previous transmission, the next L product family facil technol 2001 Microchip Technology Inc. ...

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... HCS320 based transmitter. Section 7.0 provides detail on integrating the HCS320 into a sys- tem. 2001 Microchip Technology Inc. The crypt key generation typically inputs the transmitter serial number and 64-bit manufacturer’s code into the key generation algorithm (Figure 1-1). The manufac- turer’ ...

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... NOTE: Circled numbers indicate the order of execution. DS41097C-page Encryption Algorithm Button Press Serial Number Information Transmitted Information EEPROM Array 32 Bits of Manufacturer Code Encrypted Data Serial Number Sync Counter Crypt Key Decryption Algorithm Decrypted Check for Synchronization 4 Match Counter 32 Bits Encrypted Data 2001 Microchip Technology Inc. ...

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... R SHIFT LED S2 PWM SHIFT V SS (1) 5 button remote control Note 1: The full 16 function codes are implemented using the shift button. 2: Resistor R is recommended for current limiting. 2001 Microchip Technology Inc. TABLE 2-1: Pin Name Number SHIFT PWM 6 LED 7 V ...

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... RESERVED Set to 0000H SER_0 Device Serial Number (word 0) LSb’s SER_1(Note) Device Serial Number (word 1) MSb’s — Not used — Not used RESERVED Set to 0000H CONFIG Configuration Word L algorithm. Inputs means of creating the key for 2001 Microchip Technology Inc. ...

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... Most Significant bit in the serial number is a one, then the Auto-shutoff timer is enabled, and a zero in the Most Significant bit will disable the timer. The length of the timer is not selectable. 2001 Microchip Technology Inc. HCS320 3.5 CONFIG (Configuration Word) The Configuration Word is a 16-bit word stored in ...

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... This information DD level is assumed to be operating DD level. If the bit is set low, DD level is assumed to be 6.0 volts. Refer to VOLTAGE TRIP POINTS BY CHARACTERIZATION) V LOW V sel = 0 LOW Max Min V sel = 1 LOW Max Min -40 - 100 Temp (C) 2001 Microchip Technology Inc. ...

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... Function LOW (1-bit) (1-bit) Code (4-bit) MSb 2001 Microchip Technology Inc. 4.2 Code Word Organization The HCS320 transmits a 66-bit code word when a button is pressed. The 66-bit word is constructed from a Fixed Code portion and an Encrypted Code portion (Figure 4-2). The 32 bits of Encrypted Data are generated from 4 button bits, 12 discrimination bits and the 16-bit sync value ...

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... Transmission mode S2 should not be toggled until all internal processing has been completed as shown in Figure 4-4. Preamble Header Encrypted Portion Serial Number Function DISC+ OVR (28 bits) Code (12 bits) (4-bit) Data Sync Counter (16 bits) 82 Data bits LSb Transmitted LSb first. 2001 Microchip Technology Inc. ...

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... LED FLASH FUNCTION (EACH DIVISION - 180 MS) SHIFT LEVEL 2001 Microchip Technology Inc. 5.3 VLOW: Voltage LOW Indicator The V bit is transmitted with every transmission LOW (Figure 8-6) and will be transmitted as a one if the oper- ating voltage has dropped below the low voltage trip point ...

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... BACW effectively prevents continuous transmission by only allowing the transmission of every second or every fourth code word. This reduces the average power transmitted and hence, assists in FCC approval of a transmitter device. Code Word Code Word Code Word Time Code Word 2001 Microchip Technology Inc. ...

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... The shift level is reset to zero after a transmission. The volatile nature of the shift level register requires the HCS320 to be powered continuously for correct opera- tion and not powered via the buttons. 2001 Microchip Technology Inc. HCS320 TABLE 5-1: PIN ACTIVATION TABLE SHIFT ...

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... PNP RF transistors CLKH CLKL Bit 1 Bit 2 Bit 3 Bit 14 Bit 15 Data for Word 0 (KEY_0) Repeat for each word (12 times) Data from Word 0 Bit 0 Bit 1 Bit 2 Bit 3 Bit the Bit 16 Bit 17 Data for Word 1 Bit 15 Bit 16 Bit 17 Bit190 Bit191 2001 Microchip Technology Inc. ...

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... Hold time 1 Hold time 2 Bulk Write time Program delay time Program cycle time Clock low time Clock high time Data setup time Data hold time Data out valid time Note 1: Typical values - not tested in production. 2001 Microchip Technology Inc. Min ...

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... Second Valid Code Use Generated Key to Decrypt Compare Discrimination Value with Fixed Value algorithm is a Counters Sequential Learn successful Store: Serial number Encryption key Synchronization counter TYPICAL LEARN SEQUENCE No Equal ? Yes No Equal ? Yes No ? Yes Learn Unsuccessful Exit 2001 Microchip Technology Inc. ...

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... No Is Counter No Within 32K ? Yes Save Counter in Temp Location 2001 Microchip Technology Inc. 7.3 Synchronization with Decoder (Evaluating the Counter) The sophisticated synchronization technique that does not require the calculation and storage of future codes. The technique securely blocks invalid transmissions while providing transparent resynchronization to transmitters inadvertently activated away from the receiver ...

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... HCS320 FIGURE 7-3: SYNCHRONIZATION WINDOW Entire Window rotates to eliminate use of previously used codes DS41097C-page 18 Blocked Window (32K Codes) Stored Synchronization Counter Value Double Operation (resynchronization) Single Operation Window Window (32K Codes) (16 Codes) 2001 Microchip Technology Inc. ...

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... I LED Pull-down Resistance; R 0-3 S S0,S1,S2, SHIFT Pull-down Resistance; R PWM PWM Note: Typical values are at 25°C. 2001 Microchip Technology Inc. Item Rating -0.3 to 13.3 Input voltage -0.3 to 13.3 -0 -55 to +125 300 ESD rating 4000 Commercial(C):Tamb = 0°C to +70°C Industrial(I):Tamb = -40°C to +85°C 3.5V < ...

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... HCS320 FIGURE 8-1: TYPICAL ICC CURVE OF HCS320 12.0 10.0 8.0 6.0 4.0 2.0 0 DS41097C-page [V] BAT LEGEND Typical Maximum Minimum 2001 Microchip Technology Inc. ...

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... The Auto-shutoff time-out period is not tested. FIGURE 8-4: CODE WORD FORMAT LOGIC ‘0’ LOGIC ‘1’ Bit Period T BP 50% Duty Cycle Preamble T P 2001 Microchip Technology Inc. Multiple Code Word Transmission Code Code Code Word Word Word Symbol Min Code 27 + Code BP ...

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... Max. Min. Typ. Max. Units 310 70 100 155 s 930 210 300 465 s 4.6 7.1 1.6 2.3 3.6 ms 2.0 3.1 0.7 1.0 1.6 ms 29.8 6.7 9.6 14.9 ms 31.6 7.1 10.2 15.8 ms 61.7 13.8 19.9 30.6 ms 43.0 66.5 ms bps 2001 Microchip Technology Inc. ...

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... FIGURE 8-7: HCS320 TE VS. TEMP (BY CHARACTERIZATION ONLY) 1.7 1.6 1.5 1.4 1.3 1.2 TE 1.1 1.0 0.9 0.8 0.7 0.6 -50 -40 -30 -20 - 2001 Microchip Technology Inc. T Max 3. 5. Max 5.0V DD Typical Min. E TEMPERATURE HCS320 DS41097C-page 23 ...

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... For PICmicro device marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. For QTP devices, any special marking adders are included in QTP price. DS41097C-page 24 Example HCS200 XXXXXNNN 0025 Example HCS200 XXX0025 NNN 2001 Microchip Technology Inc. ...

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... Mold Draft Angle Top Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-001 Drawing No. C04-018 2001 Microchip Technology Inc ...

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... B .013 .017 .020 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 0.51 0.48 0.62 0. 0.20 0.23 0.25 0.33 0.42 0. 2001 Microchip Technology Inc. ...

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... Links to other useful web sites related to Microchip Products • Conferences for products, Development Systems, technical information and more • Listing of seminars and events 2001 Microchip Technology Inc. HCS320 Systems Information and Upgrade Hot Line The Systems Information and Upgrade Line provides system users a listing of the latest versions of all of Microchip's development systems software products ...

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... What deletions from the data sheet could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? 8. How would you improve our software, systems, and silicon products? DS41097C-page 28 Total Pages Sent FAX: (______) _________ - _________ N Literature Number: DS41097C 2001 Microchip Technology Inc. ...

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... Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2001 Microchip Technology Inc Plastic DIP (300 mil Body), 8-lead SN = Plastic SOIC (150 mil Body), 8-lead Blank = 0° ...

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... HCS320 NOTES: DS41097C-page 30 2001 Microchip Technology Inc. ...

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... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2001, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...

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... Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-334-8870 Fax: 65-334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...