Ieee 1284 Pinout Information

Specifications

Any standard IEEE 1284 compliant printer cable will work with the printer. The customer can order the HP IEEE 124 Compliant Parallel Interface Cable C2950A (2 meters) or C2951A (3 meters).

PIN NUMBER

2 - 9

PIN ID

HostClk

AD1 - AD8

PeriphClk

PeriphAck

nAckReverse

DESCRIPTION

Used in a closed-loop handshake with PeriphAck to transfer data or address information from the host to the peripheral device.

Host to peripheral device or peripheral device to host address or data. Data 1 is the least significant bit (bit 0).

Used in a closed-loop handshake with HostAck (nAutoFd) to transfer data from the peripheral device to host.

The peripheral uses this signal for flow control in the forward direction. PheriphAck also provides a ninth data bit to determine whether command or data information is present on the data signals in the reverse direction.

The peripheral drives this signal low to acknowledge nReverseRequest. The host relies upon nAckReverse to determine when it is permitted to drive the data signals.

Xflag	This is used by the peripheral device to reply to the requested extensibility byte
	during the negotiation phase.

HostAck	The host drives this signal for flow control in the reverse direction. It is used in
	an interlocked handshake with PeriphClk. Host Ack also provides a ninth data
	bit used to determine whether command or data information is present on the
	data signals in the forward direction.

19-30

Logic Ground

Chassis Ground

Peripheral Logic High

Ground

nReverseRequest

Logic board ground.

Chassis Ground.

This signal is used to provide +5V high logic.

These pins are tied to signal ground

This signal is driven low to place the channel in the reverse direction. While in ECP mode, the peripheral is only allowed to driver the bi-directional data signals when nReverseRequest is low and 1284 Active is high.

1-12 Product Information

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HP ColorPro CAD manual Ieee 1284 Pinout Information

Models: ColorPro CAD

Specifications