Electronic Components Datasheet Search |
|
HCS410 Datasheet(PDF) 8 Page - Microchip Technology |
|
HCS410 Datasheet(HTML) 8 Page - Microchip Technology |
8 / 46 page HCS410 DS40158F-page 8 © 2011 Microchip Technology Inc. 2.2.1 TRANSMISSION DATA FORMAT The HCS410 transmission (CH Mode) is made up of several parts (Figure 2-10 and Figure 2-11). Each transmission is begun with a preamble and a header, followed by the encrypted and then the fixed data. The actual data is 69 bits which consists of 32 bits of encrypted data and 37 bits of fixed data. Each trans- mission is followed by a guard period before another transmission can begin. Refer to Table 6-4 and Table 6-5 for transmission timing specifications. The combined encrypted and nonencrypted sections increase the number of combinations to 1.47 x 1020. The HCS410 transmits a 69-bit code word when a but- ton is pressed. The 69-bit word is constructed from a Fixed Code portion and Code Hopping portion (Figure 2-8). The Encrypted Data is generated from 4 function bits, 2 overflow bits, and 10 discrimination bits, and the 16- bit synchronization counter value (Figure 2-8). The Nonencrypted Code Data is made up of 2 QUE bits, 2 CRC bits, a VLOW bit, 4 function bits, and the 28-bit serial number. If the extended serial number (32 bits) is selected, the 4 function code bits will not be transmitted (Figure 2-8). FIGURE 2-8: HOP CODE WORD ORGANIZATION (RIGHT-MOST BIT IS CLOCKED OUT FIRST) FIGURE 2-9: SEED CODE WORD ORGANIZATION Fixed Code Data Encrypted Code Data 69 bits of Data Transmitted MSB LSB CRC (2 bit) VLOW (1 bit) Button Status* (4 bits) 28-bit Serial Number Overflow (2 bits) bits (10 bits) 16-bit Synchronization CRC (2 bits) VLOW (1 bit) + Serial Number and Button Status (32 bits) + 32 bits of Encrypted Data QUE QUE (Q1, Q0 S2 S1 S0 0 Button Status (4 bits) S2 S1 S0 0 (2 bits) bit) Counter Value Discrimination and * Optional. Fixed Code Data 69 bits of Data Transmitted CRC (2 bit) VLOW (1 bit) Button* Status (4 bits) CRC (2 bits) VLOW (1 bit) + QUE QUE0 (Q1, Q0 S2 S1 S0 0 (2 bits) bit) Unencrypted Button (4 bits) SEED (60 bits) + SEED * Optional. 40158F.book Page 8 Wednesday, June 1, 2011 10:36 AM |
Similar Part No. - HCS410_11 |
|
Similar Description - HCS410_11 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |