Chapter 3, Board layout – Lanner LVC-5770 User Manual
Page 27
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Board Layout
Chapter 3
Embedded and Industrial Computing
LEK-IG1 Board
Select MCU detect function for power ignition behavior
(SW1):
The functions of the above jumpers are further explained
here.
Power Good Detection
1.
: A power-good signal
from the main board will be sent to the ignition
controller so that the ignition controller can
decide or alter the power state upon the following
instances. (Refer to the flow chart in Chapter 4):
Power-on instance
•
Power-good signal turned-low instance
•
Low Voltage Detection
2.
: Turn on this switch to
enable the automatic detection of low voltage
state of the battery. It will automatically turn
off the system when low voltage state has been
detected (Note: the low-voltage condition needs
to remain 30 seconds continually). The voltage
level can be set in the Ignition System Manager
(ISM) which is provided by Lanner as sample code
for functions on the power ignition module. The
default setting of this function: Shutdown
Voltage in the ISM is disabled. (Refer to the flow
chart in Chapter 4 and the Using the Ignition
System Manager (ISM) in Appendix A.)
Watchdog:
3.
Enable this switch to enable shutdown
after watchdog timer count-down to zero. This is a
programmable function. If there is no program to
control and monitor the watchdog timer, set this
jumper to disabled to avoid abnormal shutdown.
The default time-out value is 300 sec( you will need
an AT command to reset watchdog timer; contact
Lanner rep for this program).
ON
SW1
1
2
3
4
8
7
6
5
Selector No.
SW1
Ignition Function
1
Power Good Detection
ON: Enable
OFF: Disable
2
Low Voltage Detection
3
Watchdog
4
Programming MCU
Reserved
The default value is ON for selector 1, ON for se-
lector 2, OFF for selector 3, and OFF for selector 4
MCU (Microcontroller) Function Selection (SW1, SW2):
It is for selecting the microcontroller’s function.
An external RS-232 connector for MCU programming
(CN1)
IGN_CON1
Ignition Control Connector (IGNITION1)
ON
1
2
3
4
SW1
SW2
ON
1
2
3
4
ON
1
2
3
4
Download Data
Normal (Default)
ON
1
2
3
4
ON
1
2
3
4
ON
1
2
3
4
Jumper
Pin No.
Pin NO.
SW1
1-ON, 2-ON, 3-OFF, 4-ON
1-ON, 2-ON, 3-OFF, 4-OFF
SW2
1-OFF, 2-OFF, 3-ON, 4-ON
1-ON, 2-ON, 3-OFF, 4-OFF
Function
Download Data
Normal (Default)
Pin No.
Pin Name
1
REMOTE_POWER_ON
2
3G_POWER_ON
3
IGN_DI0
4
IGN_DI1
4
3
2
1
Pin No.
Pin Name
1
EXT_TXD_R
2
GND
3
EXT_RXD_R
1
2
3
Pin No.
Pin Name
Pin No.
Pin Name
1
IGNITION
6
D2D_EN
2
SYS_POWER_
SWITCH
7
SYS_POWER_OK
3
COM_SOUT
8
GND
4
COM_SIN
9
DC_VIN
5
D2D_PWROK
10
DCIN_VCC
10 9 8 7 1