ADVANCED VEHICLE TECHNOLOGIES, Inc.

AVT-841
Hardware Revision Descriptions
and
Order Number Descriptions
Updated: 21 September 2017
Notes

General Description
Low cost multiple interface supporting: 2-wire CAN; Single Wire CAN; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.

Hardware Configuration
Hardware configuration of the board is determined by customer requirements.
The hardware configuration is noted in the white "Rev" block on the top of the board.
Some hardware configurations are listed below. Other configurations are available, ask us.
A unique revision level and order number will be assigned for each unique hardware configuration requested.

Internal Shunt Configuration
Updated: 19 August 2010
At time of shipment, all shunts for installed protocol support will be installed.

PC Board Revision
The revision of the PC board is noted in copper on the bottom of the board.
It only changes when the board is redesigned.


Revision Notes (prior to 19 August 2010)

Revision A0
Limited release: 21 February 2006
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
This board does not have JP2 jumper for the K-line signal.
Pull down resistors (24.9 K ohm) were hand installed for the ADC inputs across the TVS diodes.
This board has an incorrect crystal configuration that was corrected by hand modification.
Prototype.
Quantity built: 4.

Revision A1
Limited release: 5 April 2006
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
Corrected the crystal circuit and other minor changes to board layout.
Prototype.
Quantity built: none.

Revision A2
Limited release: 18 May 2006
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
Added jumper JP2 for the K-line signal.
Pull down resistors (24.9 K ohm) were hand installed for the ADC inputs across the TVS diodes.
Initial production layout.
Quantity built: 8.

Revision A3
Production release: June 2006
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
Changed the layout to add pull down resistors (24.9 K ohm) to the ADC inputs.
Production layout.
Quantity built (to date): 250.

Revision A4
Production release: 26 September 2006
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
Changed 2-wire CAN termination to Ford configuration.
Performed on request only.

Revision A5
Limited release: 9 February 2007
(Decommissioned ~17 April 2007)
Low cost multiple interface supporting: CAN-C; SWC; J1850 VPW; and K-line networks.
Communication to host computer: RS-232 serial.
Modified a production AVT-841 as a prototype AVT-843.
Quantity built/modified: 1

Revision A6
General release: ~17 April 2007
Connect U1 pin #64 (PortA7) to U7 pin #2 (SCI1 TXD, PortS3).
This modification is only needed for KWP init functions and LIN mode.

Revision A7
General release: 14 June 2007
For revision "A" boards.
Modify the 2-wire CAN termination scheme to be Ford compliant.
Remove: R16, R17, R18. C25 can be removed or left in-place.
Install: R14, R15 (100 ohm); C20, C21 (470 pF); C22, C23 (100 pF).

Revision A8
General release: 17 July 2007
Remove R24; passive pull-up on K-line. This makes the passive pull-up on the K-line compatible for LIN operations.

Revision B1
General release: ~ March 2009
Incorporated corrections from revision "A" board (flip operational LED, wire for K-line control). Added mounting holes in the four corners.

Revision C
General release: 24 July 2009
Change the 2-wire CAN termination to the "Ford" configuration.
Remove: R18 and R16.
Install: R14 and R15 - 100 ohm.
Install: C20 and C21 - 470 pF.
Install: C22 and C23 - 100 pF.



Revision S
General release: 23 June 2009
Available for installation on any board, only upon specific customer request. Most useful for customers that need to support CAN bus baud rate of 1 Mbaud.
Remove 4 MHz external resonator (Y1) and replace it with an 8 MHz resonator (AWSCR-8.00MGD-T).
Install a wire from U1 pin #109 (PortK bit 7) to ground (nearest is C3 terminal furthest away from U1).

Revision T
General release: ~August 2008
Modification to change CAN4 channel from Single Wire CAN (SWC) to dual wire CAN.
Remove SWC transceiver U6.
Install AVT-84x "T" board on top of U4 using both pins of JP3 for mounting.
Install wires from the AVT-84x "T" board to the respective locations on the main AVT-84x board.

Revision xxx
General release: xxx
Description xxx



PC Board Revision (19 August 2010 and later)

Revision B1
Posted: 19 August 2010
AVT-841 units starting with serial number "00753" are RoHS compliant and lead (Pb) free.
Shipments of RoHS units began on 19 August 2010.
See the configuration chart below for the default "D" configuration.

Revision all
General release: 3 April 2013
Description: Install a 1N5819 Schottky diode on the K-line/LIN bus to minimize negative transients.
Install the 1N5819 Schottky diode on the bottom of the board, cathode (band) end attached to pin #2 of JP2, anode end soldered to the ground screen in the corner of the board.

Revision all
General release: 1 May2013
Previous note about installing a 1N5819 diode is no longer in effect.
Description: Install a 3300 pF ceramic capacitor in place of R24. (Resistor R24 is 'not installed' in all production boards.)
This modification is to minimize or eliminate the negative pulse seen on the falling edge of the K-line / LIN bus.

Revision xxx
General release: xxx
Description xxx

Revision xxx
General release: xxx
Description xxx


Circuit Configuration

Revision
CAN0
CAN4
J1850 VPW
K-line
ATD (ADC)
D3 (Default)
2-wire
not installed
not installed
Installed
not installed
E3
2-wire
SWC
(note 1)
Installed
(note 2)
Installed
not installed
F
2-wire
SWC
(note 1)
Installed
(note 2)
not installed
not installed
G - reserved
.
.
.
.
.
H - reserved
.
.
.
.
.
J3
2-wire
SWC
(note 1)
not installed
Installed
not installed
K3
2-wire
not installed
Installed
(note 2)
Installed
not installed
L3
2-wire
not installed
not installed
Installed
Installed
(note 3)
M
(not available, use rev. 'K')
2-wire
not installed
Installed
(note 2)
not installed
not installed
N
(not available, use rev. 'P')
2-wire
not installed
Installed
(note 2)
not installed
Installed
(note 3)
P3
2-wire
not installed
Installed
(note 2)
Installed
Installed
(note 3)
R3
2-wire
SWC
(note 1)
not installed
Installed
Installed
(note 3)
S3
(no longer offered)
2-wire 2-wire
(note 4)
not installed Installed not installed
T3
(no longer offered)
2-wire
2-wire
(note 4)
Installed
(note 2)
Installed
not installed

NOTES

1 - SWC transceiver installation, US$ 30.00 extra charge.
2 - J1850 VPW device installation, US$ 30.00 extra charge.
3 - ATD terminal strip installation, US$ 30.00 extra charge.
4 - Rev. "T" modification. add daughter board for CAN4: 2-wire CAN, US$ 100.00 extra charge. - No longer offered.

(The '2' after the revision letter indicates the 1N5819 Schottky clamping diode is installed on the K-line/LIN bus. - This modification was stopped as of 1 May 2013.)
(The '3' after the revision letter indicates the installation of a 3300 pF ceramic capacitor in place of R24. Effective 1 May 2013.)


Order Number Descriptions

AVT-841-002 : AVT-841 interface board, installed in a rugged enclosure, with 9-pin serial cable, with 3-foot OBD-II cable.
Status: Active.

AVT-841-003 : AVT-841 interface board, installed in a rugged enclosure, with 9-pin serial cable.
Status: Active.

AVT-841-004 : AVT-841 interface board, installed in a rugged, enclosure, with 3-foot OBD-II cable.
Status: Active.

AVT-841-005 : AVT-841 interface board, installed in a rugged enclosure, with 3-foot OBD-II cable, with small white box.
Status: Active.

AVT-841-006 : AVT-841 interface board, installed in a rugged enclosure.
Status: Active.

AVT-841-007 : AVT-841 interface board only.
Status: Active.


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