A-10 Technical Specifications
Cardinal U/G
Rev. C
A5 size APPA.FM
11/6/98 Pass 0
LProof Sign-off:
Kimura _______
Nishi _______
Hoadley _______
nACK/PtrClk/PeriphClk
Busy/PtrBusy/PeriphClk
All modes: DATA 8 is the MSB, DATA 1 is the LSB.
Compatibility mode: Acknowledgment low pulse in order to
indicate that data was transfer red from the
host.
Negotiation phase: Low signal indicates IEEE 1284 is supported;
set to high afterwards to indicate that
theXflag and “data available” flag are valid .
transfer phase: Reverse data In nibble mode, a low signal
indicates that the nibble data is valid.
Reverse idle phase: When switched from low to high, generates
an interrupt that notifies the host that there
is data available.
ECP mode: Used to transfer data from th e printer to the
host with handshaking via HostAck
(nAutoFd).
Compatibility mode: High signal indicates that the printer is not
ready to receive data.
Negotiation phase: Reflects the BUSY status of the forward
channel.
Reverse data transfer
phase: In nibble mode, this signal serves as nibble
data bit 3 and then 7.
Reverse idle phase: Reflects the BUSY status of the forward
channel.
ECP mode: Used for forward direction flow control. In
reverse direction, this signal is used as a
ninth data bit that indicates whether the data
signals indicate a command or data.