ELM327
Programmable Parameter Summary (continued)
PP
Description
Values
Default
Type
04
Default Adaptive Timing mode (AT AT setting)
00 to 02
01
D
06
07
OBD Source (Tester) Address. Not used for J1939 protocols.
Last Protocol to try during automatic searches
00 to FF
01 to 0C
F1
09
R
I
09
0A
0C
Character echo (AT E default setting)
Linefeed Character
00 = ON
FF = OFF
00
R
R
P
(ON)
00 to FF
00 to FF
0A
RS232 baud rate divisor when pin 6 is high (logic 1)
68
(38.4)
The baud rate (in kbps) is given by 4000 ÷ (PP 0C value)
For example, 500 kbps requires a setting of 08 (since 4000/8 = 500)
Here are some example baud rates, and the divisor to be used:
Baud Rate
(kbps)
PP 0C value
hex
D0
68
45
23
11
08
(dec)
(208)
(104)
(69)
(35)
(17)
(8)
19.2
38.4
57.6
115.2
230.4
500
Notes:
1. The PP 0C value must be provided as hex digits only. The
decimal values (listed above in brackets) are only shown for
your convenience.
2. The ELM327 can only process continuous byte receives at
rates of about 600 kbps maximum. If you need to connect at
a higher rate, consider adding a delay between the bytes to
maintain an average rate of 60k bytes per second or less.
3. A value of 00 is allowed for PP 0C, and it results in a baud
rate of 9600 bps.
0D
Carriage Return Character
00 to FF
0D
R
used to detect and send line ends
ELM327DSI
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