B&B Electronics Command Response Protocol HVD100A3 User Manual
Page 11
HDV100A3 Command & Response Manual-1306cr
7
B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Setting Baud 1, Baud 2
Baud Rate Setup Table
Baud
Rate
Decimal
Divisor
Hex Divisor MSB
(Baud 2)
Hex Divisor LSB
(Baud 1)
9600
48
$00 (default)
$30 (default)
14400 32
$00
$20
19200 24
$00
$18
38,400 12
$00
$0C
57,600 8
$00
$08
115,200 4
$00
$04
230,400 2
$00
$02
460,800 1
$00
$01
All baud rates are entered as hex numbers. To calculate your own
decimal divisor use the following formula. The decimal number must be
converted to hexadecimal before entering the number. Baud rates below
9,600 are not recommended because of the difference in speed between the
vehicle bus and PC serial port. Additionally, baud rates faster than 115,200
baud are not supported.
The UART clock = 7,372,800 Hz
Decimal Divisor = Clock frequency ( 7,372,800)
Baud output x 16
If you want a baud rate of 9,600 baud
Decimal
Divisor
=
7,372,800
9,600
x
16
Decimal Divisor = 48 = 30 hex
Baud
1=
30
Baud
2=
00