Epson 900N, Руководство по обслуживанию

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EPSON Stylus COLOR 900/900N Chapter 1 Product Description
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NOTE: tt-out shows the rise and fall time of output signals.
tt-in shows the rise and fall time of input signals.
Typical time of tack is shown in Table 1-10.
Table 1-10. Typical Time of Tack
The following tables show typical input and output signal levels for the
interface (IEEE-1284 level 1 device). Signal levels are based on TTL
standards.
Table 1-11. Typical Output Signal Characteristics
Table 1-12. Typical Input Signal Characteristics
NOTE: The input and output signals are active-high; the logic level is
considered HIGH at 3.0 volts or more and LOW at 2.0 V or
less. The receiver shall provide an impedance equivalent to
7.5K ohm to ground.
Table 1-13 shows the connector pin assignments and signals for the
forward channel of the parallel interface.
Table 1-9. Data Transmission Timing
Parameter Minimum Maximum
tsetup 500 ns —
thold 500 ns —
tstb 500 ns —
tready 0 —
tbusy — 500 ns
tt-out* — 120 ns
tt-in** — 200 ns
treply 0 —
tack 500 ns 10 us
tnbusy 0 —
tnext 0 —
Parallel Interface Mode Typical Time of Tack
High speed 1 us
Normal speed 3 us
Parameters Minimum Maximum
Voltage -0.5 V 5.5 V
Current 0.32 mA
when V
out
= 2.4 V
12 mA
when V
out
= 0.4 V
Capacitance — 50 pF
Parameters Minimum Maximum
Voltage 0.8 V 2.0 V
Current 0.32 mA
when V
in
= 2.0 V
12 mA
when V
in
= 0.8 V
Capacitance — 50 pF