RTC6 boards
Doc. Rev. 1.0.21 en-US
4 RTC6 PCIe Board – Layout and Interfaces
81
Laser Control Signals
Laser Control Signals LASER1 and LASER2 are
identical to the LASER Connector and depend on the
set laser mode, see Section ”Laser Control Signals”,
page 73.
The signals are referenced (as with the
LASER Connector) to GND2.
On RTC6 PCIe Boards with Option “DC/DC
Converter”, GND2 and the Laser Control Signals are
galvanically decoupled from GND
(1)
.
On RTC6 PCIe Boards without Option “DC/DC
Converter”, GND2 are GND identical, see Chapter 2.6
”Options”, page 38.
8-Bit Digital Output Port
The buffered 8-bit digital output port (TTL level) is
intended for lasers with digital power control (for
example, to control the lamp current of a YAG laser).
Of course, it can be used for any other purpose as
well. The output is in high-impedance mode until an
initial value is assigned to it.
For programming the output see Chapter 9.1.2 ”8-Bit
Digital Output Port”, page 283.
The MSB (DATA7) of the output value can be used for
other purposes. To do this, it can be assigned to an
other pin on the EXTENSION 2 socket connector
(pin (15), pin (17), see above).
If the solder jumper is correspondingly set (see
above), Pin (17) outputs a LATCH signal. The
RTC6 PCIe Board automatically generates the LATCH
signal (a 5 µs pulse, active-HIGH) when the value at
the 8-bit digital output port is outputted.
If several bits are simultaneously transferred as a data
word (and not independently from each other) by the
8-bit digital output port, then the LATCH signal
should be used for synchronization of data
transmission.
The value at the 8-bit digital output port should be
read out with the rising edge of the LATCH signal,
which is generated 5 µs after the value is written at
the 8-bit digital output port, see also Figure 23.
The LATCH signal is referenced to GND
(1)
. Its
maximum current load is 10 mA.
(1) See footnote on page 73.
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