Interface Specification; Figure 1-7. Data Transmission Timing - Epson STYLUS 4001968 Service Manual

Manual

1.3 INTERFACE SPECIFICATION

The Stylus 800 is equipped with an 8 bit parallel interface, standard.
Data format:
Synchronization:
Handshaking:
Signal level:
Adaptable connector:
Data transmission timing:
DATA
Table 1-6 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-6. Signal and Connector Pin Assignments
Pin No. Signal Name
1 STROBE
2-9 DATA 1-8
10
BUSY
11
12 PE
13 SLCT
14 AFXT
15 NC
Rev. A
8 bit parallel
STROBE pulse swchronization
By BUSY and ACKNLG signals
36-pin 57-30360 (Amphenol) or equivalent
See Figure 1-7.

Figure 1-7. Data Transmission Timing

1/0
The STROBE pulse is used to read data from the host
I computer. The pulse width must be 0.5@ or more. Normally,
it is HIGH, and data is latched with rising edge of this signal.
DATA 1-8 are parallel data bits. When one of these signals is
HIGH, the data bit is 1; when LOW, the
significant bit (MSB) is DATA 8. The signal state must be
maintained for 0.5 pS on either side of STROBE signal's active
edge.
approximately 10 vS. This signal goes LOW upon the
o
completion of data reception, to indicates that the printer is
ready to receive further data.
The BUSY signal informs the host computer of the printe~s
o status. When this signal is HIGH, the printer cannot accept
further data.
This signal indicates whether paper is available in the printer
o
or not. A HIGH level indicates a no paper condition.
o Pulled up to +5V through a 1.0 KQ resistor in the printer.
If this signal is set to LOW, the printer automatically performs
one line feed upon receipt of a CR (carriage return) code. The
status of this signal is checked only at power on and
initialization.
Not
O. SuS(Min.)
O. SuS(Min.)
O. SuS(Min.)
Description
data
bit is O. The most
1-9