HCS365-I/SM Microchip Technology, HCS365-I/SM Datasheet
HCS365-I/SM
Specifications of HCS365-I/SM
Available stocks
Related parts for HCS365-I/SM
HCS365-I/SM Summary of contents
Page 1
... The HCS365 combines a hopping code generated by a nonlinear encryption algorithm, a serial number, and status bits to create a secure transmission code. The length of the transmission eliminates the threat of code scanning and code grabbing access techniques ...
Page 2
... The encoder portion of a keyless entry sys- tem is integrated into a transmitter carried by the user. The transmitter is operated to gain access to a vehicle or restricted area. The HCS365 is meant cost- effective yet secure solution to such systems requiring very few external components (Figure 2-1). ...
Page 3
... As indicated in the block diagram on page one, the HCS365 has a small EEPROM array which must be loaded with several parameters before use; most often programmed by the manufacturer at the time of produc- tion. The most important of these are: • A serial number, typically unique for every encoder • ...
Page 4
... HCS365 FIGURE 1-2: BUILDING THE TRANSMITTED CODE WORD (ENCODER) EEPROM Array Crypt Key Sync Counter Serial Number FIGURE 1-3: BASIC OPERATION OF RECEIVER (DECODER) 1 Received Information Button Press Serial Number Information Check for 2 Match Perform Function Indicated by 5 button press NOTE: Circled numbers indicate the order of execution. ...
Page 5
... DEVICE DESCRIPTION As shown in the typical application circuits (Figure 2-1), the HCS365 is an easy device to use. It requires only the addition of buttons and RF circuitry for use as the encoder in your security application. A description of each pin is described in Table 2-1. Refer to Figure 2-2 for information on the I/O pins. ...
Page 6
... All the security related options are read protected. The initial counter value is also programmed at the time of production. From then on the device maintains the counter itself. The HCS365 has built in redundancy for protection and can recover from counter corruption. The counter will not increment if the previous write was ...
Page 7
... NFET Figure 2-2( DATA, RFEN STEP N Outputs 2002 Microchip Technology Inc. FIGURE 2-3: Sample Buttons Get Config DATA OUT No No Preliminary HCS365 BASIC FLOW DIAGRAM OF THE DEVICE OPERATION START Yes Read Seed Seed TX? No Increment Counter Encrypt Transmit Yes Time- Out ...
Page 8
... HCS365 3.0 EEPROM ORGANIZATION A summary of the HCS370 EEPROM organization is shown in the three tables below. The address column shows the starting address of the option and its length or bit position. Options larger than 8 bits are stored with the Most Significant bits at the given address. ...
Page 9
... E 28 bits = 0 Disable = 0 Disable = 0 Never = 0 ( Disable = 0 User = 0 Value 2 ( Value 2 ( (1) Value Preliminary HCS365 Reference Section 3.2.1 3.3 3.2, 3.2.1 3.2, 3.2.2 3.2, 3.2.1 Format 4.1 PWM Manchester VPWM PPM 4 bits = 1 3.2 Enable = 1 5.5 Enable = 1 4.1 Once = 1 5.3 100 5.3 Enable = 1 3.3 Production = 1 3 ...
Page 10
... The HCS365 contains two transmitter configurations with separate serial numbers, encoder keys, discrimi- nation values, counters, and seed values. This means that the HCS365 can be used as two independent encoders. The code word is calculated using one of two possible encoder configurations. Most options for code word and modulation formats can be different from Encoder 1 and Encoder 2 ...
Page 11
... Counter SERIAL NUMBER BUT Overflow (28 Bits) 4 Bits Counter SERIAL NUMBER BUT Overflow (32 Bits) 4 Bits Preliminary HCS365 FUNCTION CODES Function Code xx1x 2 x1xx 2 1xxx 2 xxx1 2 ) detector and Cyclic Redundancy Hopping Code Portion (32 Bits) Synchronization Counter 16 Bits DISC 2 Bits 10 Bits 15 ...
Page 12
... C1 C0 3.2.3.1 Low Voltage Detector Status (V A low battery voltage detector onboard the HCS365 can indicate when the operating voltage drops below a predetermined value. There are two options available depending on the Low Voltage Trip Point Select (VLOWSEL) configuration option. The two options pro- vided are: • ...
Page 13
... Seed Time (SDTM) configuration option. When SDTM is set to a value other than 0.0s, the HCS365 will transmit a code hopping transmis- sion until the selected time expires. After the selected time expires, the seed code words are transmitted ...
Page 14
... Encoder 1 and Encoder 2. There are four different modulation formats available on the HCS365 that can be set individually for Encoder 1 or Encoder 2. The Modulation Select (MSEL) Config- uration Option is used to select between: • Pulse Width Modulation (PWM) • ...
Page 15
... Baud Rate, the following options are also available to change the transmission format: • If the START/STOP Pulse Enable (STEN) config- uration option is enabled, the HCS365 will place a leading and trailing ‘1’ on each code word. This is necessary for modulation formats such as Manchester and PPM to interpret the first and last data bit. • ...
Page 16
... FSK DATA PLL 5.3 LED Output The LED pin will be driven low while the HCS365 is transmitting data. The LED On Time (T selected between 50 ms and 100 ms with the LED On Time Select (LEDOS) configuration option. The LED Off Time ( fixed at 500 ms. When the V LEDOFF ...
Page 17
... Button Queue Information (QUEUE) The queuing or repeated pressing of the same buttons can be handled in two ways on the HCS365. This is controlled with the Queue Counter Enable (QUEN) configuration option. This option can be different for Encoder 1 and Encoder 2. When the QUEN option is disabled, the device will reg- ister up to two sequential button presses ...
Page 18
... HCS365 7.0 INTEGRATING THE HCS365 INTO A SYSTEM Use of the HCS365 in a system requires a compatible decoder. This decoder is typically a microcontroller with compatible firmware. Microchip will provide (via a license agreement) firmware routines that accept transmissions from the HCS365 and decrypt the hopping code portion of the data stream. These routines provide system designers the means to develop their own decoding system ...
Page 19
... This window excludes previously used, perhaps code-grabbed transmissions from accessing the system. Note: The synchronization method described in this section is only a typical implementation and because it is usually implemented in firmware, it can be altered to fit the needs of a particular system. Preliminary HCS365 technology patent scope includes a DS41109D-page 19 ...
Page 20
... HCS365 FIGURE 7-3: SYNCHRONIZATION WINDOW Entire Window rotates to eliminate use of previously used codes 7.4 Security Considerations The strength of this security is based on keeping a secret inside the transmitter that can be verified by encrypted transmissions to a trained receiver. The transmitter’s secret is the manufacturer’s key, not the encryption algorithm ...
Page 21
... EE OQ base station, a transmitter/transponder, a battery-less transponder and various HCS4XX samples. It also includes the PC software to configure and program the K L parts for evaluation (DM303005 Preliminary HCS365 supplies, which allow it to verify pro- min and V max for DD DD Evaluation Kit parts for evaluation ...
Page 22
... HCS365 TABLE 8-1: DEVELOPMENT TOOLS FROM MICROCHIP MCP2510 MCRFXXX rfHCSXXX HCSXXX 93CXX 25CXX/ 24CXX/ PIC18FXXX PIC18CXX2 PIC17C7XX PIC17C4X PIC16C9XX PIC16F8XX PIC16C8X PIC16C7XX PIC16C7X PIC16F62X PIC16CXXX PIC16C6X PIC16C5X PIC14000 rfPIC12XXXX PIC12CXXX Tools Software Emulators Debugger Programmers DS41109D-page 22 Kits Eval and Boards Preliminary Demo 2002 Microchip Technology Inc ...
Page 23
... Exposure to maximum rating conditions for extended periods may affect device reliability. Note 1: Power dissipation is calculated as follows: Pdis=V 2002 Microchip Technology Inc. ........................................................................................-0. ......................................................................................................... ± ).................................................................................................... ± Â Preliminary HCS365 + 0. Â {( Â( DS41109D-page 23 ...
Page 24
... HCS365 TABLE 9-1: DC CHARACTERISTICS: HCS365 DC Characteristics All Pins Except Power Supply Pins Param Sym. Characteristic No. D001 V Supply Voltage DD D003 V V start voltage to ensure POR DD internal Power-on Reset signal D004 SV V rise rate to ensure DD DD internal Power-on Reset signal D005 V Brown-out Reset Voltage ...
Page 25
... TABLE 9-1: DC CHARACTERISTICS: HCS365 (CONTINUED) DC Characteristics All Pins Except Power Supply Pins Param Sym. Characteristic No. Output Low Voltage D080 V Output pins OL Output High Voltage D090 V Output pins OH D091 V LED OH Internal Pull-down Resistance D100 Rpd Data EEPROM Memory D120 E Endurance D D121 Vdrw ...
Page 26
... HCS365 TABLE 9-2: AC CHARACTERISTICS Commercial (C +70 C AMB Industrial (I - +85 C AMB Parameter Sym. Timing Element T E Power-up Time T PU PLL Set-up Time T PLL LED On Time T LEDON LED Off Time T LEDOFF Guard Time T G Note 1: All timing values are subject to the oscillator variance and are not tested. ...
Page 27
... B1 B .014 .018 .022 § eB .310 .370 .430 Preliminary HCS365 MILLIMETERS MIN NOM MAX 8 2.54 3.56 3.94 4.32 2.92 3.30 3.68 0.38 7.62 7.94 8.26 6.10 6.35 6.60 9.14 9.46 9.78 3.18 3 ...
Page 28
... HCS365 Package Type: 8-Lead Plastic Small Outline (SM) – Medium, 208 mil (SOIC Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Overall Length Foot Length Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...
Page 29
... Standard marking consists of Microchip part number, year code, week code and traceability code. For marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. For SQTP devices, any special marking adders are included in SQTP price. 2002 Microchip Technology Inc. Example HCS365 XXX/NNN 9925 Example HCS365 XXXXXXXX 9925NNN Preliminary HCS365 DS41109D-page 29 ...
Page 30
... HCS365 ON-LINE SUPPORT Microchip provides on-line support on the Microchip World Wide Web (WWW) site. The web site is used by Microchip as a means to make files and information easily available to customers. To view the site, the user must have access to the Internet and a web browser, such as Netscape Explorer ...
Page 31
... Is 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? 2002 Microchip Technology Inc. Total Pages Sent FAX: (______) _________ - _________ N Literature Number: Preliminary HCS365 DS41109D DS41109D-page 31 ...
Page 32
... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. . PART NO. X /XX Device Temperature Package Range Device HCS365: Code Hopping Encoder HCS365T: Code Hopping Encoder (Tape and Reel - SM only) Temperature Range - = 0×C to +70× -40×C to +85×C Package P ...
Page 33
... 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. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...
Page 34
... 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: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...