Agilent Technologies 35670A Service Manual page 360

ACKn
BUSY
FAULTn
IPn
PA0 - PA7
PE
SELECT
STROBEn
Voltages and Signals
A10 Rear Panel
Parallel Port
The Parallel Port is a 25-pin, Centronics port. The Parallel Port can interface with
printers or plotters. The following table lists signals at the Parallel Port connector
(A10 J100). A description of each signal follows the table.
Signal Name
ACKn
BUSY
FAULTn
IPn
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PE
SELECT
STROBEn
Logic Gnd
Not Used
Acknowledge — The printer pulses this line low after it accepts a byte of data and is ready for
more data.
Busy — The printer sets this line high when it cannot receive data due to data entry, a full
buffer, or error status.
Fault — The printer sets this line low if it reaches an error state.
Input Prime — This line pulses low to reset the printer and clear the print buffer.
Printer Data Bus —This is the 8-bit parallel data bus. These lines transmit a byte of data to the
printer.
Paper Error — The printer sets this line high when it is out of paper.
Selected — The printer sets this line high to indicate that it has been selected.
Strobe — This line pulses low when a byte of data is ready. A low pulse on this line clocks the
data into the printer.
9-16
Pin
10
11
15
16
2
3
4
5
6
7
8
9
12
13
1
18
14, 17, 19 - 25
Agilent 35670A