EPSON Stylus Color 600
Rev. A
1-1
Following lists “Notes” when using Parallel Interface.
“
Return GND pin” in the table means twist pair return and is used for all control signals except for
Logic H,+5V, Chassis, GND and NC. In this twist pair return, returning side is connected to
GND (16,33, 19-30 pin) for twist pair return. Also, these cables are shielded wires and it is
effective to connect to each chassis GND in the PC and printer for electrostatic noise.
Conditions for Interface are based on TTL level. Rise and fall time should be within 0.2ms.
Refer to the figure 1-9 for transmission timing of each signals.
Do not perform data transmission ignoring /ACK or BUSY signal. (Perform the data transmission
after confirming that /ACK and BUSY signals are Low.)
It is possible to perform the printing test including interface circuit without using equipment from
outside when 8-bit data signal(20-27 pin) is set to appropriate word code and connect them
forcefully to /ACK and /STRB.
[Data Transmission Timing for Forward Channel]
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 ---
Note) *: Rise and fall time of every output signals.
**: Rise and fall time of every input signals.
Parallel I/F mode Typical time of tack
High speed 2us
Normal speed 4us
Byte Data n Byte Data n+1
Thold
Tsetup
Tstrb
Tnext
Tready Tbusy
Treply
Tack Tnbusy
Data
/STROBE
BUSY
/ACKNLG
Figure 1-9. Parallel Interface Timing Chart(Forward Channel)
Table 1-14. Timing Parameters and Value
Table 1-15. Typical Time of Tack
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