THORLABS DCC1645C - Accessories for DCx cameras

© 2013 Thorlabs GmbH
5 Specifications
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5.5.2.5 RS-232 Serial Interface
Attention
The General Purpose IO are not potential-free and have no protective circuit. Faulty wiring (overvoltage,
undervoltage or inverting the wiring when used as serial interface) can result in a damage in the electronics.
During operation as serial interface only LVCMOS levels are allowed to the connector pins. To get a serial RS-232
compliant interface, an external level shifter (LVCMOS/RS-232) is required.
Applying RS-323 levels directly to the pins as well as mixing up the signals RxD and TxD can destroy the camera
electronics!
Serial interface specification
Minimum output voltage
Min.
Max.
Signal level "Low"
0
0.8
V
Signal level "High"
2.0
4.0
V
Maximum input voltage
Min.
Max.
Signal level "Low"
0
0.8
V
Signal level "High"
2.0
4.0
V
Supported Baud rates
9.600
19.200
38.400
57.600
115.200
baud
Transmission mode
Full duplex, 8N1
Data bits
8
Stop bits
1
Parity
None
Note
With the 8N1 mode, the maximum payload data rate achievable is 80% of the selected baud rate.
Serial interface wiring (UART)
The following figure shows the wiring of the serial interface with GPIO 1 as camera-side output (TxD) and GPIO 2
as camera-side input (RxD). The GPIO must be configured accordingly (see is_IO() ).
Serial interface connector (UART)
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