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12 Getting Started
Each port is identical and consists of 6 control lines and 8 data lines. There
are 7 registers for control and status on each port. In addition, the module
also has Manufacturer ID, Device Type, and Module Status/Control
Registers. Figure 1-1 shows the locations of the ports and a simplified
diagram of a single port. Of the seven control lines, three (I/O, CTL, and
FLG) are used with SCPI commands and three (RES, STS, and PIR) are
controlled through register access. Chapter 4 — "Understanding the
Agilent E1330B Digital I/O Module" contains detailed descriptions of these
lines.
Each port has two sets of hardware configuration jumpers. One set of
jumpers allows you to connect the FLG lines together for multi-port data
transmission. Another jumper selects either open collector operation or
internal pull-up to TTL compatible levels on the data lines. Chapter 2 —
"Configuring the Agilent E1330B Digital I/O Module" describes how to set
these jumpers.
SCPI commands provided for the Digital I/O allow operation on a single bit,
8-bit "BYTE" format, 16-bit "WORD" format (using 2 ports), or 32-bit
"LWORd" format (using 4 ports).
Table 1-1 shows the mapping of bit numbers from the 8-bit ports to the
16- or 32-bit ports. Chapter 5 — "Agilent E1330B Digital I/O Command
Reference" describes each command in detail and Chapter 3 — "Using the
Agilent E1330B Digital I/O Module" gives examples of the use of SCPI
commands.
Port #
Bit designations
Port #
Bit designations
Port #
Bit designations
Two 3-meter, 60-wire ribbon cables with an insulation displacement header
connector (ribbon cable connector) on one end are included with the Digital
I/O module. Additional cable sets can be ordered (Agilent part number
E1330-61601) from your nearest Agilent Technologies Sales Office.
Table 1-1. Data Lines
8-bit (BYTE) Operations
0
1
7------0
7------0
16-bit (WORD) Operations
0
15------8
7------0
32-bit (LWORd) Operations
0
31------24
23------16
2
3
7------0
7------0
2
15------8
7------0
15------8
7------0
Chapter 1
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