Electronic Components Datasheet Search |
|
HI-3282CDM-10 Datasheet(PDF) 4 Page - Holt Integrated Circuits |
|
HI-3282CDM-10 Datasheet(HTML) 4 Page - Holt Integrated Circuits |
4 / 14 page BIT TIMING The ARINC 429 specification contains the following timing specification for the received data: 100K BPS ± 1% 12K -14.5K BPS (HI-3282BPJx-xx only - 6.5K BPS min.) 1.5 ± 0.5 µsec 10 ± 5 µsec 1.5 ± 0.5 µsec 10 ± 5 µsec 5 µsec ± 5% 34.5 to 41.7 µsec HIGH SPEED LOW SPEED BIT RATE PULSE RISE TIME PULSE FALL TIME PULSE WIDTH (HI-3282BPJx-xx only - 76.9 µsec max.) The 32nd bit of received ARINC words stored in the receive FIFO is used as a Parity Flag indicating whether good Odd parity is re- ceived from the incoming ARINC word. The parity bit is reset to indicate correct parity was received and the resulting word is then written to the receive FIFO. The receiver sets the 32nd bit to a “1”, indicating a parity error and the resulting word is then written to the receive FIFO. Therefore, the 32nd bit retrieved from the receiver FIFO will always be a “0” when valid (odd parity) ARINC 429 words are received. Once 32 valid bits are recognized, the receiver logic generates an End of Sequence (EOS). If the receiver decoder is enabled and the 9th and 10th ARINC bits match the control word program bits or if the receiver decoder is disabled, then the EOS clocks the RECEIVER PARITY Odd Parity Received Even Parity Received RETRIEVING DATA FUNCTIONAL DESCRIPTION (cont.) SEL EN D/R DECODER CONTROL BITS / MUX CONTROL LATCH ENABLE CONTROL 32 TO 16 DRIVER 32 BIT LATCH 32 BIT SHIFT REGISTER TO PINS CONTROL BIT BD14 CLOCK OPTION CLOCK CLK BIT COUNTER AND END OF SEQUENCE PARITY CHECK 32ND BIT DATA BIT CLOCK EOS WORD GAP WORD GAP TIMER BIT CLOCK END START SEQUENCE CONTROL ERROR CLOCK ERROR DETECTION SHIFT REGISTER SHIFT REGISTER NULL ZEROS SHIFT REGISTER ONES EOS BITS9&10 FIGURE 2. RECEIVER BLOCK DIAGRAM HI-3282, HI-3282B data ready flag flip flop to a "1", or (or both) will go low. The data flag for a receiver will remain low until after ARINC bytes from that receiver are retrieved. This is accomplished by activating with SEL, the byte selector, low to retrieve the first byte and activating with SEL high to retrieve the second byte. retrieves data from receiver 1 and retrieves data from receiver 2. If another ARINC word is received and a new EOS occurs before the two bytes are retrieved, the data is overwritten by the new word. D/R1 D/R2 EN EN EN1 EN2 both INTERNAL LIGHTNING PROTECTION (-10 Only) APPLICATION NOTE 300 The HI-3282-10 configurations are similar to the HI-3282 with the exception that it allows an external 10K to 15K ohm resistor to be added in series with each ARINC input without affecting the ARINC input thresholds. This option is especially useful in applications where lightning protection circuitry is also required. The design of the HI-3282-10 device requires the external 10K to 15K ohm series resistors for proper ARINC level detection. The typical 10 volt differential signal is translated and input to a window comparator and latch. The comparator levels are set so that, with the external 10K to 15K ohm resistors, they are just below the standard 6.5 V minimum ARINC data threshold and just above the 2.5 V maximum ARINC null threshold. The receivers of the HI-3282-10 when used with external 15K ohm resistors will withstand DO-160F, Level 3, waveforms 3, 4, 5A and 5B. No additional lightning protection circuit is necessary. Please refer to the Holt AN-300 Application Note for additional information and recommendations on lightning protection of Holt Line Drivers and Receivers. HOLT INTEGRATED CIRCUITS 4 |
Similar Part No. - HI-3282CDM-10 |
|
Similar Description - HI-3282CDM-10 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |