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USER MANUAL DRVN520 KENWOOD
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Coiled cable or wire with connectors, no visible text or symbolsnatural_image
Technical line drawing of a mechanical device with no visible text or symbols
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⑨ ⑧ ⑦ RECnatural_image
Exterior view of a modern curved architectural structure with a vehicle passing through (no signage or text visible)
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a admissionationtext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Appuyez sur

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Black and white photo of a highway with cars driving under an overpass, mountainous background (no visible text or symbols)text_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Diagram showing a device connected to a card with an arrow indicating the connection point.text_image
Screen Adjustment Display OFF Camera SETUP Audio USBnatural_image
Black and white photo of a highway with a car driving under a curved arch, snow-capped mountains in the background (no visible text or symbols)natural_image
Black-and-white fisheye view of a rear camera on a paved road with lane markings and buildings in the background (no readable text or symbols)- Appuyez sur


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Dashboard Camera REC HGB FHDtext_image
Dashboard Camera REC H8 FHDtext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Appuyez sur


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Black and white photo of a car driving on a highway with a vehicle in the background (no visible text or symbols)text_image
Recording Settings Parking Recording Settings Driving Support Settings System Settings6. Appuyez sur [Mounting Height Settings].
![KENWOOD DRVN520 - Appuyez sur [Mounting Height Settings]. - 1](/content/2026/03/430879/images/b5f3e97d6bdb6d04806cccc3d86c43672ef4cb5f0231f65f4bfa48a895c1f50c.jpg)
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Driving Support Settings Lane Departure Warning OFF Departure Delay Warning OFF Detection Range Settings Mounting Height Settingstext_image
Mounting Height Settings 1.2m 1.35m 2mtext_image
Driving Support Settings Lane Departure Warning OFF Departure Delay Warning OFF Detection Range Settings Mounting Height Settingstext_image
Detection Range Settings Adjust the horizon linetext_image
Detection Range Settings Adjust the horizon linetext_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Driving Support Settings Forward Collision Warning OFF Lane Departure Warning OFF Departure Delay Warning OFF Forward Collision Warning ON ON(Beep Only) OFF CloseContinuous recordings
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Screen Adjustment Display GF Camera SETUP Audio USB- Appuyez sur


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Black and white photo of a highway with a curved elevated structure, mountainous background, and a car driving on the road (no visible text or symbols)- Appuyez sur


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Dashboard Camera 05(95) 01(94) 03(17) 11(99)text_image
Recording Folder List Continuous Recordings 91File Manual Recordings 5File Event Recordings 1File Parking Recordings 3File Deletetext_image
①②③ 01/01/17 12:37:15 ④ 00:07 HDD FHD Delete Hide x1 5text_image
01/01/17 12:37:15 00:07 HOR FHD Hide Delete x1 5text_image
01/01/12 12:37:15 00:07 Hide Delete x1 5text_image
01/01/17 12:32:15 09:07 Hide Hide Delete x1 5text_image
01/01/17 12:32:15 09:07 HSE FHD Hide Delete x1 5text_image
01/31/17 12:22:15 00:07 HD Hide Delete x1 5text_image
Screen Adjustment Display Off Camera SETUP Audio USB- Appuyez sur

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Dashboard Camera IEC HDR FVO- Appuyez sur

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Dashboard Camera 05(95) 01(94) 03(17) 11(89)text_image
Recording Folder List Continuous Recordings 91File Delete Manual Recordings 5File Event Recordings 1File Parking Recordings 3Filetext_image
Recording Folder Delete List Continuous Recordings 91File Manual Recordings 5File Event Recordings 1File Parking Recordings 3Filetext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Appuyez sur


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Black and white photo of a highway with a car driving, under a curved arch structure, mountains in background (no visible text or symbols)text_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Windows File Explorer Categories Favorites Documents Downloads Forward Theme Libraries Directories My Documents My Documents Music Policies Bookers Libraries Systems Files Networks Systems Files New Publisher New Publisher New Publisher Macropies Macropies SACCP Macropies Save Aspects: SACCP Save Aspects: SACCP Save Aspects: SACCP Save Aspects: SACCPtext_image
Windows File Explorer Options Favorites Desktops Download Microsoft Teams Mac OSOS My Documents My Documents My Documents Music Features Features Libraries Systems Files Networks Systems Files New Orders New Orders New Orders Homeogeneity Systems Files Computer Systems Files SOOP Properties New Product: New product New Product: XOM Save... Canceltext_image
BACKUP BACKUP LOCATION: 12mm Frame 1900s POLDER: No.71-0578, No.63-0578 CHECK ALL UNOK ALL No.70/2018 12:00:12 AM NORMAL: No.63-0578, No.63-0578 Event Record No.70/2018 12:00:12 AM EVENT: No.70/20180001340V No.70/2018 01-48:00 AM NORMAL: No.63-0578, No.63-0578 No.70/2018 01-48:00 AM WARNING: No.63-0578, No.63-0578 FREE SPACE: 120.00 Mb REQUIRED SPACE: 42 Mb CHANGE EXCLUDE CANCELtext_image
BACKUP BACKUP LOCATION: LAIN RANK NUMBER POLDER: 04-12-2018, 05-01-2018 CHECK ALL UNOK ALL 04-01/2018 12:00 12 AM NORMAL 03/01/2018/06/01 MOV 04-01/2018 12:00 12 AM EVENT/04/01/2018/06/01 MOV Event Record 29-01/2018 01:48:01 AM NORMAL 03/01/2018/06/01 MOV 29-01/2018 01:48:01 AM NORMAL 03/01/2018/06/01 MOV FREE SPACE: 156.95 MHz REQUIRED SPACE: 42 MHz EXECUTE CANCELtext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Appuyez sur [


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Dashboard Camera IEC HOR FHO- Appuyez sur |


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Dashboard Camera 05(95) 01(94) 03(7) 11(89) E.C HDR FHD Hidetext_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
System Settings MPH System Version 0.29 Update System Format SD Card Factory ResetDimensions externes (L) x (H) x (P)
microSDHC logo is a trademark of SD-3C, LLC.
@2015 Google Inc. All rights reserved.
GoogleMaps ^™ and GoogleEarth ^™ are registered trademarks of Google Inc.
This product is licensed only for the following applications based on the AVC Patent Portfolio License.
1) Consumers recording video (hereinafter referred to as AVC Video) compliant with the MPEG-4 AVC standard for personal use and non-profit purposes.
2) Playing AVC Video (video consumers recorded for personal use and non-profit purposes or video recorded by a provider that has obtained a license from MPEG LA) For details, refer to the MPEG LA, LLC. website.
http://www.mpegla.com/
MD5 utility
/* crypto/md5/md5.h */
Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
This package is an SSL implementation written
by Eric Young (eay@cryptsoft.com).
The implementation was written so as to conform with Netscapes SSL.
This library is free for commercial and non-commercial use as long as the following conditions are aheared to. The following conditions apply to all code found in this distribution, be it the RC4, RSA, Ihash, DES, etc., code; not just the SSL code.
The SSL documentation included with this distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com).
Copyright remains Eric Young's, and as such any Copyright notices in the code are not to be removed.
If this package is used in a product, Eric Young should be given attribution as the author of the parts of the library used.
This can be in the form of a textual message at program startup or in documentation (online or textual) provided with the package.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
-
Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer.
-
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
-
All advertising materials mentioning features or use of this software must display the following acknowledgement: "This product includes cryptographic software written by Eric Young (eay@cryptsoft.com)"
-
The word 'cryptographic' can be left out if the rouines from the library being used are not cryptographic related :-).
-
- If you include any Windows specific code (or a derivative thereof) from the apps directory (application code) you must include an acknowledgement:
-
"This product includes software written by Tim Hudson (tjh@cryptsoft.com)" THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
The license and distribution terms for any publicly available version or derivative of this code cannot be changed. i.e. this code cannot simply be copied and put under another distribution license [including the GNU Public License.]
CRC utility
COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or code or tables extracted from it, as desired without restriction.
First, the polynomial itself and its table of feedback terms. The polynomial is +X^1 1 + X^10 + X^8 + X^7 + X^5 + X^4 + X^2 + X^ 1 + X^0
Note that we take it "backwards" and put the highest-order term in the lowest-order bit. The X^32 term is "implied"; the LSB is the X^31 term, etc. The X^0 term (usually shown as "+1") results in the MSB being 1 Note that the usual hardware shift register implementation, which is what we're using (we're merely optimizing it by doing eight-bit chunks at a time) shifts bits into the lowest-order term. In our implementation, that means shifting towards the right. Why do we do it this way? Because the calculated CRC must be transmitted in order from highest-order term to lowest-order term. UARTs transmit characters in order from LSB to MSB. By storing the CRC this way we hand it to the UART in the order low-byte to high-byte; the UART sends each low-bit to hight-bit; and the result is transmission bit by bit from highest- to lowest-order term without requiring any bit shuffling on our part.
Reception works similarly The feedback terms table consists of 256, 32-bit entries. Notes
The table can be generated at runtime if desired; code to do so is shown later. It might not be obvious, but the feedback terms simply represent the results of eight shift/xor operations for all combinations of data and CRC register values
The values must be right-shifted by eight
bits by the "updcrc logic; the shift must be unsigned (bring in zeroes). On some hardware you could probably optimize the shift in assembler by using byte-swap instructions polynomial \$edb88320 CRC32 code derived from work by Gary S. Brown.
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Illustration of bundled cables with connectors (no text or symbols)natural_image
Technical line drawing of a mechanical device with no visible text or symbols
text_image
⑦ ⑧ ⑨ RECtext_image
Diagram illustrating a mechanical or electrical setup with a tool interacting with a component, including an inset showing a cross-section and directional arrow.natural_image
Exterior view of a modern curved elevated structure with a vehicle driving on a road (no visible text or symbols)
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Screen Adjustment Display Off Camera SETUP Audio USB- Toccare

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Black and white photo of a highway with mountainous background, no visible text or symbols on the road surface.text_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Diagram showing a projector connected to a card via cable and inserting into a device, with an arrow indicating the process.text_image
Screen Adjustment Display OFF Camera SETUP Audio USBnatural_image
Black and white photo of a highway with vehicles, under a curved arch structure, mountains in background (no visible text or symbols)natural_image
Exterior view of a parking lot with lanes and a building in the background (no signage)3. Toccare

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Dashboard Camera REC HOL FHOtext_image
Dashboard Camera REC HR HDtext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Toccare

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Black and white photo of a highway with a vehicle and a camera icon overlay (no readable text or symbols)- Toccare [Driving Support Settings].

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Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Setting System Settings6. Toccare [Mounting Height Settings].
![KENWOOD DRVN520 - Toccare [Mounting Height Settings]. - 1](/content/2026/03/430879/images/08723cb94ae95ae43dfd7fd09f224622c9ce90cee422f46329935cd9cc5e8959.jpg)
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Driving Support Settings Lane Departure Warning OFF Departure Delay Warning OFF Detection Range Settings Mounting Height Settingstext_image
Mounting Height Settings 1.2m 1.35m 2m8. Toccare [Detection Range Settings].
![KENWOOD DRVN520 - Toccare [Detection Range Settings]. - 1](/content/2026/03/430879/images/2ee2dac45e3f223b81e47c690b3ef22345cde97035b8360edd2285754365701e.jpg)
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Driving Support Settings Lane Departure Warning OFF Departure Delay Warning OFF Detection Range Settings Mounting Height Settings 1.2mtext_image
Detection Range Settings Adjust the horizon linetext_image
Detection Range Settings Adjust the horizon line2. Toccare [Driving Support Settings].
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 1](/content/2026/03/430879/images/373ed082750639ae83430272491a1379f49273bba5dd1fa35255f188fe222761.jpg)
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Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Driving Support Settings Forward Collision Warning OFF Lane Departure Warning OFF Departure Delay Warning OFF![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 2](/content/2026/03/430879/images/7d114c9420b4b37897c1c037caec24d918492ec8bf30f365a2cae17cee7ecd33.jpg)
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Forward Collision Warning ON ON(Beep Only) OFF Closetext_image
Screen Adjustment Display GF Camera SETUP Audio USB- Toccare
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 3](/content/2026/03/430879/images/84c9ac8777800be4e05aba42f6dce324b3fee59a544c01720b1728d9b68e99d9.jpg)
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Black and white photo of a highway with a curved arch bridge and mountainous background (no visible text or symbols)- Toccare ·
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 4](/content/2026/03/430879/images/edb3a2b9b52cec5ec671dbc761651c4ee7ef8ef34cbee02caf442e185f0b46b9.jpg)
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Dashboard Camera 05(95) 01(94) 03(17) 11(89)text_image
Recording Folder List Continuous Recordings 91File Manual Recordings 5File Event Recordings 1File Parking Recordings 3File Deletetext_image
①②③ 01/01/17 12:37:15 ④ 00:07 HDD FHD Hide Delete x1 5text_image
01/01/17 12:37:15 00:07 HOR FHD Hide Delete x1 5text_image
01/01/17 12:37:15 00:07 Hide Delete x1 5text_image
01/01/17 12:37:15 09:07 HDG FND Hide Delete x1text_image
01/01/17 12:32:15 09:07 HSB THD Hide Delete x1 5text_image
01/31/17 12:22:15 00:07 HD Hide Delete x1 5text_image
Screen Adjustment Display Off Camera SETUP Audio USB- Toccare
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 5](/content/2026/03/430879/images/a78076cc78ae3be79aff64de81a9c570bbbba316f32a8214754e442070529c54.jpg)
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Dashboard Camera EC H0 F0- Toccare
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 6](/content/2026/03/430879/images/107c893fe58512b2cf077821a953254672469858bdfb95b3b3f79b8e49e29d67.jpg)
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Dashboard Camera 05(95) 01(94) 03(7) 11(89)- Toccare [Delete].
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 7](/content/2026/03/430879/images/3608ed9f6fefdf6d4aa5f15092f796dea03e545735a672ab69cefc4fe8b66878.jpg)
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Recording Folder List Continuous Recordings 91File Delete Manual Recordings 5File Event Recordings 1File Parking Recordings 3Filetext_image
Recording Folder Delete List Continuous Recordings 91File Manual Recordings 5File Event Recordings 1File Parking Recordings 3Filetext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Toccare
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 8](/content/2026/03/430879/images/cb2e8b238356272570b0cfebdaa3396bf0a8963f1630264cede598ba809d9b80.jpg)
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Dashboard Camera IEC HDR FWDtext_image
Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settingstext_image
Save As File Edit View Insert Browse Default Download Microsoft Excel Edit Documents My Documents Public Documents Music Picture Delete Categories: Save Asym Save Asym: XML Save Asym: Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym Remove Asym- Premere [Save].
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BACKUP BACKUP LOCATION: Clear Runoff FLOWS POLDERS: 06/15/2018, 05:30:35 PM CHECK ALL UNOKHL ALL 06/15/2018 12:00:12 AM NORMALX#0000000000 PROV 06/15/2018 12:00:12 AM EVENT#0000000000 PROV EVENT RECORD 06/15/2018 01:48:30 AM NORMALX#00000000 PROV 06/15/2018 01:48:30 AM NORMALX#00000000 PROV FREE SPACE: 198.995 MHz REQUIRED SPACE: 45 Mbps EXECUTE CANCELtext_image
Screen Adjustment Display Off Camera SETUP Audio USB- Toccare [ ]
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 9](/content/2026/03/430879/images/452d497bdc10e17f6ef85e3c235fbefe2ec83a01bebbca459bf09c40c8806464.jpg)
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Dashboard Camera REC FOR FHO- Toccare [ ]
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 10](/content/2026/03/430879/images/68c7f6e1ed7ee2fad5da207155bbb26cb79ec6c13bbe8651c14714e175bf2a04.jpg)
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Dashboard Camera ECC H08 FHD Hide 05(95) 01(94) 03(17) 11(89)- Toccare [System Settings]
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 11](/content/2026/03/430879/images/a63e2cc12fe5920cab071f40f8d3e673a2ddc8933ecc5ef2f56b8f9561bde9ac.jpg)
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Dashboard Camera SETUP Recording Settings Parking Recording Settings Driving Support Settings System Settings- Toccare [Format SD Card]
![KENWOOD DRVN520 - Toccare [Driving Support Settings]. - 12](/content/2026/03/430879/images/26b32a32bc67b42b7c846800a12229161055d5e0a2dad5085a9f150f7d8eeb92.jpg)
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System Settings MPH System Version 0.29 Update System Format SD Card Factory ResetmicroSDHC logo is a trademark of SD-3C, LLC.
@2015 Google Inc. All rights reserved.
GoogleMaps™ and GoogleEarth™ are registered trademarks of Google Inc.
This product is licensed only for the following applications based on the AVC Patent Portfolio License.
1) Consumers recording video (hereinafter referred to as AVC Video) compliant with the MPEG-4 AVC standard for personal use and non-profit purposes.
2) Playing AVC Video (video consumers recorded for personal use and non-profit purposes or video recorded by a provider that has obtained a license from MPEG LA) For details, refer to the MPEG LA, LLC. website.
http://www.mpegla.com/
MD5 utility
/* crypto/md5/md5.h */
Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
This package is an SSL implementation written
by Eric Young (eay@cryptsoft.com).
The implementation was written so as to conform with Netscapes SSL.
This library is free for commercial and non-commercial use as long as the following conditions are aheared to. The following conditions apply to all code found in this distribution, be it the RC4, RSA, Ihash, DES, etc., code; not just the SSL code.
The SSL documentation included with this distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com).
Copyright remains Eric Young's, and as such any Copyright notices in the code are not to be removed.
If this package is used in a product, Eric Young should be given attribution as the author of the parts of the library used.
This can be in the form of a textual message at program startup or in documentation (online or textual) provided with the package.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
-
Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer.
-
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
-
All advertising materials mentioning features or use of this software must display the following acknowledgement: "This product includes cryptographic software written by Eric Young (eay@cryptsoft.com)"
-
The word 'cryptographic' can be left out if the rouines from the library being used are not cryptographic related :-).
-
- If you include any Windows specific code (or a derivative thereof) from the apps directory (application code) you must include an acknowledgement:
-
"This product includes software written by Tim Hudson (tjh@cryptsoft.com)" THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
The license and distribution terms for any publicly available version or derivative of this code cannot be changed. i.e. this code cannot simply be copied and put under another distribution license [including the GNU Public License.]
CRC utility
COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or code or tables extracted from it, as desired without restriction.
First, the polynomial itself and its table of feedback terms. The polynomial is +X^1 1 + X^10 + X^8 + X^7 + X^5 + X^4 + X^2 + X^ 1 + X^0
Note that we take it "backwards" and put the highest-order term in the lowest-order bit. The X^32 term is "implied"; the LSB is the X^31 term, etc. The X^0 term (usually shown as "+1") results in the MSB being 1 Note that the usual hardware shift register implementation, which is what we're using (we're merely optimizing it by doing eight-bit chunks at a time) shifts bits into the lowest-order term. In our implementation, that means shifting towards the right. Why do we do it this way? Because the calculated CRC must be transmitted in order from highest-order term to lowest-order term. UARTs transmit characters in order from LSB to MSB. By storing the CRC this way we hand it to the UART in the order low-byte to high-byte; the UART sends each low-bit to hight-bit; and the result is transmission bit by bit from highest- to lowest-order term without requiring any bit shuffling on our part.
Reception works similarly The feedback terms table consists of 256, 32-bit entries. Notes
The table can be generated at runtime if desired; code to do so is shown later. It might not be obvious, but the feedback terms simply represent the results of eight shift/xor operations for all combinations of data and CRC register values
The values must be right-shifted by eight
bits by the "updcrc logic; the shift must be unsigned (bring in zeroes). On some hardware you could probably optimize the shift in assembler by using byte-swap instructions polynomial \$edb88320 CRC32 code derived from work by Gary S. Brown.