Interfaces - Epson Stylus Photo 870 Service Manual

EPSON Stylus Photo 870/1270
Storage temperature
o
Storage: –4 to 104 F (–20 to 40
o
at 104 F (40
Packing: –22 to 104
o
at 104 F (40
Transit: –22 to 140
o o
140 F (60
Dimensions
1.7 (W) x 2.1 (D) x 1.5 inches (H)
42.9 (W) x 52.7 (D) x 38.5 mm (H)

6.9.14 Interfaces

The EPSON Stylus Photo 870/1270 each come equipped with a USB
interface and a bidirectional parallel interface.
6.9.14.1 Parallel Interface (Forward Channel)
! Transmission mode: 8 bit parallel, IEEE-1284 compatibility mode
! Synchronization:By STROBE pulse
! Handshaking: BY BUSY and ACKNLG signal
! Signal level: TTL compatible level
! Adaptable connector: 57-30360 (amphenol) or equivalent
The BUSY signal is HIGH before setting either /ERROR LOW or PE
HIGH, and held HIGH until all these signals return to their inactive
state. The BUSY signal is HIGH:
! During data entry (see Figure 6-21)
! When the input data buffer is full
! When the /INIT signal is LOW or during hardware initialization
! During a printer error condition (see /ERROR signal)
! When the parallel interface is not selected
The /ERROR signal is LOW when one of the following errors occurs:
! Printer hardware error (fatal error)
o
C); within a month
o
C)
o o
F (–30 to 40 C); within a month
o
C)
o o
F (–30 to 60 C); within 120 hours at
C) and within a month at 104
! Paper Out error
! Paper Jam error
! Ink Out error
The PE signal is HIGH when there is a Paper Out error.
Figure 6-21 and Table 6-8 show the data transmission timing.
DATA
o o
F (40 C)
/STROBE
BUSY
/ACKNLG
data byte n
t
hold
t t
setup stb
t
ready t busy
t
t ack
reply
Figure 6-21. Data Transmission Timing
Chapter 7 Appendix
data byte n+1
t
next
t nbusy
103