Epson ColorPage EPL-C8000 User Manual page 184

nAutoFd/HostBusy/HostAck
Compatibility mode:
Negotiation phase:
Reverse data transfer
phase:
Reverse idle phase:
ECP mode:
NC
Not used.
PeripheralLogicHigh
Pull up to + 5 V with 3.9 k .
A-12
Technical Specifications
Not used.
In order to request 1284 mode, this signal is
set low and IEEE 1284active (nSelectIn) is set
high. Afterwards, this signal is set high
whenPtrClk (nAck) is set low.
In nibble mode, setting this signal low
indicates to the printer that the host is ready
to receive data. When this signal is
subsequently set high, it indicates that the
host received the data.
This signal is set high in response to a PtrClk
(nAck) low pulse in order to return to be
reverse data phase. If this signal is set high at
the same time that IEEE 1284active
(nSelectIn) is set low, the IEEE 1284 idle
phase is aborted and the interface returns to
compatibility mode.
Used for reverse direction flow control. Also
used for handshaking via PeriphClk (nAck).