The four pieces of BNC connectors are the digital outputs of the TTL Output Control Module. They have identifier letters A to D instead of numbers. The reason is that the digital input/output lines of the system bus are numbered. This way they cannot be mixed up during the assignment process of the input/output lines of the 12-bit USB System Controller to the channels of the TTL Output Control Module.
Outputs: TTL compatible, 10 unit-loads capability
Warning! The digital outputs produce standard TTL voltage levels. They must not be connected to the inputs of a 3.3 V digital system directly, because the 3.3 V inputs would be destroyed! There are special voltage translator circuits to solve this incompatibility.
The four pieces of BNC connectors are the digital outputs of the TTL Output Control Module. They have identifier letters A to D instead of numbers. The reason is that the digital input/output lines of the system bus are numbered. This way they cannot be mixed up during the assignment process of the input/output lines of the 12-bit USB System Controller to the channels of the TTL Output Control Module.
Outputs: TTL compatible, 10 unit-loads capability
Warning! The digital outputs produce standard TTL voltage levels. They must not be connected to the inputs of a 3.3 V digital system directly, because the 3.3 V inputs would be destroyed! There are special voltage translator circuits to solve this incompatibility.
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