Epson 2000P - Stylus Photo Color Inkjet Printer, Service Manual

Page: 16 / 178

EPSON Stylus PHOTO 2000P Revision A
Product Descriptions Interface 16
Typical timing for tack is shown below.
* A low logic level on the Logic H signal is 2.0V or less when the printer is
powered off, and this signal is equal to or exceeding 3.0V when the printer
is powered on. The receiver shall provide an impedance equivalent to 7.5K
ohm to ground.
Table 1-5. Parameters
Parameter Minimum Maximum
tsetup 500ns -
thold 500ns -
tstb 500ns -
tready 0 -
tbusy - 500ns
tt-out
*1
*1:Rise and fall time of every output signal.
- 120ns
tt-in
*2
*2:Rise and fall time of every input signal.
- 200ns
treply 0 -
tack 500ns 10us
tnbusy 0 -
tnext 0 -
Table 1-6. Typical Time of Tack
Parallel I/F Mode Typical Time of tack
High Speed 0.5us
Normal Speed 2us
Table 1-7.
Signal Level: TTL Compatible (IEEE-1284 level 1 device)
Parameter 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