ELM329LP datasheet(68/87 Pages) ELM

68 / 87 page

ELM329L

68 of 87

ELM329L DSA

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Programmable Parameter Summary (continued)

Description

Values

Default

Type

CAN auto formatting (AT CAF default setting)

CAN filler byte (used to pad out messages)

CAN auto flow control (AT CFC default setting)

(ON)

00 to FF

00 = ON

FF = OFF

00 = ON

FF = OFF

Default (Single Wire) Transceiver Mode

M0 - M1 pin setting during normal CAN operation (see page 25)

(normal)

00 to 03

Default CAN Silent Monitoring setting (for AT CSM)

(ON)

FF = ON

00 = OFF

CAN wakeup message rate (AT SW default setting)

setting = value x 20.48 msec

00 to FF

(2.0 sec)

00 to 02

Default Wakeup Mode (AT WM setting)

(OFF)

(11111000)

00 to FF

More Power Control options

Each bit of this byte controls an option, as follows:

b7: Auto LP (CAN) control

0: disabled

1: enabled

allows low power mode if the CAN activity stops

b6: Auto LP (CAN) timeout

0: 2 mins

1: 10 mins

no CAN activity timeout setting

b5: Auto LP (CAN) warning

0: disabled

1: enabled

if enabled, says ‘ACT ALERT’ 1 minute before timeout

b4: Active LED

0: off

1: flashes

setting during low power, if there was CAN activity on pin 11

b3: Previous CAN

0: required

1: ignored

wakeup on CAN activity may be set to require that there was

CAN activity prior to going to low power mode

b2: reserved for future - leave set at 0

b1: reserved for future - leave set at 0

b0: Control output

0:normal

1:CAN Monitor

if set to 1, the Control (pin 4) output follows CAN activity

(Control is a high level when there is CAN activity detected)

(11111111)

00 to FF

CAN Filter outputs (controls CAN sends while searching)

The bits of this byte control options, as follows:

b7: 500 kbps match

0: ignored

1: required

b6: 250 kbps match

0: ignored

1: required

b5 to b1: reserved for future - leave set to 1

b0: send if bus is quiet

0: not allowed 1: allowed

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