Nibble Mode - Epson Stylus Pro 7600 Service Manual

EPSON Stylus Pro 7600/9600

1.6.1.2 Nibble Mode

SPECIFICATION
Transmission mode: 8 bit parallel
Synchronization: By STROBE pulse
Handshaking: By BUSY and ACKNLG signal
Signal level: TTL compatible (IEEE1284Level 1 device)
Data trans. timing: Refer to the IEEE-1284 specification
Extensibility Request:
The printer responds affirmatively when the extensibility request values are 00H
or 04H, that mean,
00H Request Nibble Mode Reverse Channel Transfer.
04H Request Device ID; Return Data Using Nibble Mode Rev Channel
Transfer.
Device ID:
When IEEE1284.4 is valid
• <xx><xx>
(Character strings, depending on <Model Name>)
• MFG: EPSON;
• CMD: ESCPL2,BDC,D4;
• MDL: <Stylus Pro 7600-DYE/Stylus Pro 9600-DYE>;
• CLS: PRINTER;
• DES: EPSON<SP><Stylus Pro 7600-DYE/Stylus Pro 9600-
DYE>;(<SP>:space)
When IEEE1284.4 is not valid
<xx><xx>
•
(Character strings, depending on <Model Name>)
MFG: EPSON;
•
CMD: ESCPL2,BDC;
•
MDL: <Stylus Pro 7600-DYE/Stylus Pro 9600-DYE>;
•
CLS: PRINTER;
•
DES: EPSON<SP>T<Stylus Pro 7600-DYE/Stylus Pro 9600-DYE>;
•
(<SP>:space)
Product Description
CONNECTOR PIN ASSIGNMENT AND SIGNALS
Table 1-55. Connector Pin Assignment and Signals (Nibble)
Pin Return
Signal Name
No. GND Pin
1 19 HostClk
2 20 DATA0
3 21 DATA1
4 22 DATA2
5 23 DATA3
6 24 DATA4
7 25 DATA5
8 26 DATA6
9 27 DATA7
10 28 PtrClk
PtrBusy
11 29
/DataBit-3,7
AckDataReq
12 28
/DataBit-2,6
Xflag
13 28
/DataBit-1,5
14 30 HostBusy
31 30 -INIT
-DataAvail
32 29
/DataBit-0,4
36 30 1284-Active
18 -- Logic H
35 -- +5V
17 -- Chassis GND
16,33,
-- GND
19-30
15,34 -- NC
Note "*": In/Out refers to the direction of signal flow from the printer's point of view.
Interfaces
Revision A
In/Out * Function
In Host clock signal.
In
In
In
The DATA0 through DATA7 signals
In
represent data bits 0 to 7, respectively. Each
signal is at high level when data is logical 1
In
and low level when data is logical 0.
In
In
In
Out Printer clock signal.
Printer busy signal and reverse channel
Out
transfer data bit 3 or 7.
Acknowledge data request signal and reverse
Out
channel transfer data bit 2 or 6.
X-flag signal and reverse channel transfer
Out
data bit 1 or 5.
In Host busy signal.
In Not used.
Data available signal and reverse channel
Out
transfer data bit 0 or 4.
In 1284 active signal.
Always "HIGH". Pulled up to +5 V via 3.9 K
Out
ohm resistor.
Always "HIGH". Pulled up to +5 V via 1.0 K
Out
ohm resistor.
-- Chassis GND.
-- Signal GND.
-- Not used
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