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A-10
Technical Specifications
Flamingo
Rev. C
A5 size APPSPEC.FM
11/5/98 Pass 0
L
Proof Sign-off:
M.Takata _______
K.Nishi _______
K.Pipa _______
nAutoFd/HostBusy/HostAck
NC
Not used.
PeripheralLogicHigh
Pull up to + 5 V with 3.9 k
Ω
.
Compatibility mode: Not used.
Negotiation phase: In order to request 1284 mode, this signal
is set low and IEEE 1284active (nSelectIn)
is set high. Afterwards, this signal is set
high when PtrClk (nAck) is set low.
Reverse data transfer phase: 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.
Reverse idle phase: 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 1284 Active (nSelectIn) is set low,
the IEEE 1284 idle phase is aborted and
the interface returns to compatibility
mode.
ECP mode: Used for reverse direction flow control.
Also used for handshaking via PeriphClk
(nAck).