SATO GL4XXE Manual de Serviço descarregar pdf (Página 23)

Unit 3: Interface Specifications

GL4xxe Service Manual

3-6

Host Clock / nWrite. Driven by the host. Data is transferred from the host to the printer. When the printer sends

data, two types are available. If it is Nibble Mode, the signal is set high. If it is Byte Mode, the signal is set low.

Data 1 through Data 8. These pins are host-driven in Compatibility Mode and bidirectional in Byte Mode. They are

not used in Nibble Mode. Data 1 is the least significant bit; Data 8 is the most significant bit.

Printer Clock / Peripheral Clock / Interrupt. Driven by the printer. A signal from the printer indicating the

character or function code has been received and the printer is ready for the next data transfer.

Printer Busy / Peripheral Acknowledge / nWait. Driven by the printer. Indicates the printer cannot receive data.

(Data bits 4 and 8 in Nibble Mode.)

Acknowledge Data Request / nAcknowledge Reverse. Driven by the printer. Indicates the printer is in a fault

condition. (Data bits 3 and 7 in Nibble Mode.)

Xflag. Driven by the printer. A high true level indicating the printer is ready for data transfer and the printer is

online. (Data bits 2 and 6 in Nibble Mode.)

Host Busy / Host Acknowledge / NDStrobe. Driven by the host. Activates auto-line feed mode.

Peripheral Logic High. Driven by the printer. When the line is high, the printer indicates all of its signals are in a

valid state. When the line is low, the printer indicates its power is off or its signals are in an invalid state.

nReverse Request. Driven by the host. Resets the interface and forces a return to Compatibility Mode idle phase.

20 Signal Ground (Data 1)

21 Signal Ground (Data 2)

22 Signal Ground (Data 3)

23 Signal Ground (Data 4)

24 Signal Ground (Data 5)

25 Signal Ground (Data 6)

26 Signal Ground (Data 7)

27 Signal Ground (Data 8)

28 Signal Ground (PError, Select, nAck)

29 Signal Ground (Busy, nFault)

30 Signal Ground (nAutiFd, nSelectLn, nInit)

31 Host nInit

32 Printer NFault nDataAvail aDataAvail

33 Not Defined

34 Not Defined

35 Not Defined

36 Host nSelectLn 1284 Active 1284 Active

1 Signals required for ieee 1284 mode. The length of the data cable from the

host computer to the printer should not exceed 32 feet (10 meters).

Table of IEEE1284 signals

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 203 204

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