Compuprint 10200 Programmer Manual Instrukcja Użytkownika Pobierz pdf (Strona 217)

Interfaces

213

AD1 … AD8 (Data 1 … Data 8)

Compatibility Mode: Forward channel data.

Negotiation Phase: Extendibility request value.

Nibble Mode: NOT USED. Reverse Data Transfer

Phase:

Byte Mode: Reverse channel data.

PrtClk (nAck)

Compatibility Mode: Pulsed low by the printer to acknowledge the transfer of a data from the

host.

Negotiation Phase: Set low to acknowledge 1284 support, then set high to indicate that the

Xflag (Select) and data available flags may be read.

Reverse Data Transfer

Phase:

Used in both Nibble and Byte Modes to qualify data being sent to the host.

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