Real Time Devices DM6814 Digital Output

DM6814 Digital Output block


Simulink® Real-Time™ Library for Real Time Devices


You can configure two digital I/O lines for output. You can use only one digital input block per port. You can use an input and an output block for the same port, but then each block must use channels different from those in the other block.

Scaling Input to Output

Hardware Output

Block Input Data Type




<0.5 = TTL low
≥0.5 = TTL high

Block Parameters

Channel Vector

Enter either numbers 1 or 2 to select the digital output lines you use with this port. This driver allows the selection of individual digital output lines in arbitrary order. The number of elements defines the number of digital lines used.

For example, to use all available digital outputs for the current port, enter


Number the lines beginning with 1 even if this board manufacturer starts numbering the lines with 0.


Select port A, B, or C.

Reset vector

The reset vector controls the behavior of the channel at model termination. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that setting is replicated over the channel vector. If you specify a value of 1, the corresponding channel is reset to the value specified in the initial value vector. If you specify a value of 0, the channel remains at the last value attained while the model was running.

Initial value vector

The initial value vector contains the initial values (0 or 1) of the output channels. Enter a scalar or a vector that is the same length as the channel vector. If you enter a scalar, that value is replicated as the initial value over the channel vector. The channels are set to these initial values between the time the model is downloaded and the time it is started.

Sample time

Enter the base sample time or a multiple of the base sample time (-1 means sample time is inherited).

Base address

Enter the base address of the board. This entry must correspond to the DIP switch setting on the board. For example, if the DIP switch setting is 300 (hexadecimal), enter 0x300.

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