Agilent Technologies Agilent 3499A, Руководство пользователя

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Chapter 7 Plug-in Modules
N2263A 32-bit Digital I/O Module
7
N2263A 32-bit Digital I/O Module
The Agilent N2263A is a 32-bit digital I/O module. It provides 32
bidirectional data lines (bits) and 3 handshake lines (used for control and
handshaking). All lines are TTL compatible. The 32 I/O bits can be
addressed as 32 individual 1-bit ports, four independent 8-bit ports, two
independent 16-bit ports, or one 32-bit port.
The four 8-bit ports are completely independent of each other and may be
used separately. For example, two of the ports can be used for output
operations, while the other two ports are used for input operations.
However, all 8 bits in a given port must be either input or output bits
(not a combination of input and output).
Five handshaking modes are available for this module. The handshaking
modes are described beginning on page 98. Handshaking uses up to
three control lines:
•
Peripheral Control (PCTL)
•
I/O direction (I/O)
•
Peripheral Flag (PFLG)
Port and bit numbering is show in the table below. Note that the ports
are numbered differently if you are using the 3488 System mode.
Specification for the N2263A are given on page 309.
System
Mode
32-Bit Port # 16-Bit Port # 8-Bit Port # Bit #
SCPI mode PORT 00
PORT 00
PORT 00 Bits 0-7
PORT 01 Bits 8-15
PORT 02
PORT 02 Bits 16-23
PORT 03 Bits 24-31
3488A Mode PORT 06
PORT 04
PORT 00 Bits 0-7
PORT 01 Bits 8-15
PORT 05
PORT 02 Bits 16-23
PORT 03 Bits 24-31