Epson DFX-9000 - Interfaces

Epson DFX-9000 Revision B
Product Description Basic specifications 24
1.2.8 Interfaces
This printer provides 4 interfaces as standard: bi-directional 8-bit
parallel, serial, USB, and a Type-B optional interface slot.
1.2.8.1 Parallel interface (forward channel)
Transmission mode: 8 bit parallel, IEEE-1284 compatibility mode
Adaptable connector: 57-30360 (Amphenol) or equivalent
Synchronization: -STROBE pulse
Handshaking: BUSY and -ACKNLG signals
Signal level: TTL compatible (IEEE-1284 level 1 device)
* Active-High signals are 2.0 V or lower when the printer is off and 3.0
V or higher when the printer is on. The receiver has an impedance
equivalent to 7.5 kΩ.
Data transmission timing
Figure 1-19. Data transmission timing
Notes: 1. Rise and fall time of output signals
2. Rise and fall time of input signals
Table 1-18. Parameters
Parameter Minimum Maximum Condition
VOH* - 5.5 V -
VOL* -0.5 V - -
IOH* - 0.32 mA VOH = 2.4 V
IOL* - 12 mA VOL = 0.4 V
CO - 50 pF -
VIH - 2.0 V -
VIL 0.8 V - -
IIH - 0.32 mA VOL = 0.4 V
IIL - 12 mA VIL = 0.8 V
CI - 50 pF -
Table 1-19. Parameters
Parameter Minimum Maximum
tsetup 500 nsec -
thold 500 nsec -
tstb 500 nsec -
tready 0-
tbusy - 500 nsec
treply --
tack 500 nsec 10 µs
tnbusy 0-
tnext 0-
ttout
1
- 120 nsec
ttin
2
- 200 nsec
DATA
-STROBE
BUSY
-ACKNLG
Data byte n
thold
tstbtsetup
tready
tbusy
treply tack tnbusy
tnext
Data byte n+1