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Logmar Camera Solutions IVS
C) Service port:
This is a service port of the camera meant for factory programming, validation and upgrading.
Refrain from connecting into this connector as it could break the camera and always use approved
Logmar accessories with it.
8pin DIN pinout:
Pin
Description
Notice
1
Multiplexer output A
Maximum voltage: 3V, Maximum current: 1mA
2
Multiplexer output B
Maximum voltage: 3V, Maximum current: 1mA
3
Open drain trigger output
Maximum drain voltage: 13V, Maximum current: 1mA
4
SiM3U167 - RESET
Never connect to this pin!
– Reset
5
SiM3U167 - SWO
Never connect to this pin!
- Serial wire output
6
SiM3U167 - SWC
Never connect to this pin!
- Serial wire clock
7
SiM3U167 - SWD
Never connect to this pin!
- Serial wire data
8
Ground
System and battery ground.
Multiplexer setting:
Mux
Description
Notice
0
Multiplexer output A = RECORD Button
Open Drain – Provide external pull up 10KΩ (max 3V)
Multiplexer output B = FUNC Button
Open Drain – Provide external pull up 10KΩ (max 3V)
1
Factory use only
Analog Voltage reference 2.5V
Factory use only
DDS reference clock 32.768KHz
2
Factory use only
DDS Output clock (PLL Reference)
Factory use only
RPM (PLL train signal)
3
Multiplexer output A = I2C SDA
Open Drain – Provide external pull up 4K7Ω (max 3V)
Multiplexer output B = I2C SCL
Open Drain – Provide external pull up 4K7Ω (max 3V)
The default multiplexer setting is “0” whereby it’s possible to override the camera’s FUNC and RECORD
button externally.
Multiplexer settings 1 and 2 are for factory use only and cannot be user invoked.
Multiplexer setting 3 is used for the Logmar accessory protocol.
Multiplexer output A and B always shifts position in synchronization meaning that if Output A is set to
position “1” then Output B is also automatically at position “1”.
