EPSON Stylus Color 900 Revision C
Product Description Interface 24
NOTE: tt-out shows the rise and fall time of every output signal.
tt-in shows the rise and fall time of every input signal.
Typical time of tack is shown in Table 1-10.
Table 1-10. Typical Time of Tack
Table 1-11. Signal level for TTL Compatible
(IEEE-1284 level 1 device)
* A LOW logic level on the Logic H signal is as follows:
2.0 V or less when the printer is turned off.
3.0 V or more when the printer is turned on.
The receiver provides an impedance equivalent to 7.5 K
Ω
to
ground.
See Table 1-12 which shows the connector pin assignment and signals
for the forward channel of the parallel interface.
Table 1-9. Data Transmission Timing
Parameter Minimum Maximum
tsetup 500ns ---
thold 500ns ---
tstb 500ns ---
tready 0 ---
tbusy --- 500ns
tt-out* --- 120ns
tt-in** --- 200ns
treply 0 ---
tack 500ns 10us
tnbusy 0 ---
tnext 0 ---
Parallel Interface Mode Typical Time of Tack
High speed 1 us
Normal speed 3 us
Parameters Minimum Maximum COndition
VOH* --- 5.5V
VOL* -0.5V ---
IOH* --- 0.32mA VOH = 2.4V
IOL --- 12mA VOL = 0.4V
CO --- 50pF
VIH --- 2.0V
VIL 0.8V ---
IIH --- 0.32mA VIH = 2.0V
IIL --- 12mA VIL = 0.8V
CI --- 50pF
