Functional Description

Operation

The HT6026 encoder begins a one-word transmission cycle upon receipt of a transmission enable (TE,

active low). This cycle will repeat itself as long as the transmission enable (TE ) is held low. Once the

transmission enable returns high, the encoder output completes its final N

×2 word cycle, and then

stops as shown in Figure 1. The total number of transmission cycles allowed is always adjusted to an

even number automatically.

Information word

An information word consists of 2 periods as shown:

Address/data waveform

Each programmable address/data pin can be externally set to one of the following three logic states:

Figure 2. Composition of information

Figure 3. Address/Data bit waveform

Figure 1. Transmission timing

HT6026

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2nd Oct ’97