Epson Stylus pro 7700m, Service Manual

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1.3 INTERFACE SPECIFICATIONS
The Stylus Pro is standard-equipped with an 8-bit parallel and serial interface.
1.3.1 Parallel Interface Specifications
Data format: 8-bit parallel
Synchronization: By STROBE pulse synchronization
Handshaking: By BUSY and ACKNLG signals
Signal level: TTL compatible level
Adaptable connector: 36-pin 57-30360 (Amphenol or equivalent)
Data transmission timing: See Figure 1-7.
Note: Transition time (rise time and fall time) of every input signal must be less than 0.2
µ
s.
The Busy signal is active (HIGH) under the following conditions:
r During data reception (See Figure 1-7.)
r When the input buffer is full
r When the INIT input signal is active
r During initialization
r When the ERROR or PE signal is active
r During the self-test mode
r During the demonstration mode
r During the default setting mode
r When a fatal error occurs
The ERROR signal is active (LOW) under the following conditions:
r When a paper-out error occurs
r When a no ink cartridge error occurs
r When a fatal error occurs
The PE signal is active (HIGH) under the following conditions:
r When a paper-out error occurs
r When a fatal error occurs
Approx. 5 µs
Approx. 5 µs
0.5 µs (minimum)
0.5 µs (minimum)
0.5 µs (minimum)
B U S Y
A C KN L G
D A T A
S T RO B E
Figure 1-7. Data Transmission Timing
Stylus Pro Service Manual Product Description
Rev.B 1-9