5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

USB

Created by BP_DE

RX

L -

Line

TX

K -

Line

pin13

pin26

DECOUPLING CAPS

pin3

VAG COM

HEX-USB
adapter
for
ver4.09

This Is GND
connected  ONLY of
side of PC.

This is car GND  (KL.31)
connected Only of side of
car.

L1 -any L with  I  =  or >150mA

All C  (exept C4) and
 R are  1206 package

Vbat- unswiched
batery voltage

=

optional

max 10mA
truth LEDs

Q1 to Q4 
BC817-40 or
similar

Added connection betwin R21 and pin
24 - was forgoten in firsrt release.

Rew.1.1 -

1

1.1

USB Interface fot VAG COM ver4.09

A3

1

1

Monday, January 23, 2006

Title

Size

Document Number

Rev

Date:

Sheet

of

RTS#

DTR#

TXD

SHIELD

VCC

VCC

VCC

KL30

VCC

KL30

VCC

VCC

VCC

KL30

VCC

KL30

L1

INDUCTOR

R20
2k2

D2

LED

R2 220R

R12

2k2

Q1
NPN

R16

2k2

ISO1

TLP181

R19

100k

R14

10k

R17

10k

R9

2k2

Q2
NPN

ISO2

TLP181

D1

LED

U2

FT232BM

25

24

23

22

21

20

19

5

28

4

32

1

2

2

9

9

18

1

7

31

14

15

16

12

10

11

1

3

6

3

0

2

6

3

8

7

27

TXD

RXD

RTS#

CTS#

DTR#

DSR#

DCD#

RSTOUT#

XTOUT

RESET#

EECS

EESK

EEDATA

A

G

N

D

G

N

D

RI#

G

N

D

TEST

PWRCTL

PWREN#

TXDEN

TXLED#

SLEEP#

RXLED#

V

C

C

-I

O

3V3OUT

A

V

C

C

V

C

C

V

C

C

USBDM

USBDP

XTIN

R1 220R

R10

10k

CN1
CN-USB

1
2
3
4

5

R21

2k2

U3

93C46

1
2
3
4

8
7
6
5

CS
SK
DIN
DOUT

VCC

NC
NC

GND

R3

10k

R8

1k5

R13

220R

C9
33nF

Q3
NPN

Q4

NPN

R11

10k

ISO3

TLP181

C10
10nF

R4
2k2

R15
220R

C11
0.1uF

Y1

6MHz 

R5
470R

R6

27R

J1

OBD-II Con.-SAE-J1962

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

C1
0.1uF

R7

27R

C2
0.1uF

C3
0.1uF

R18
220R

C4
10uF