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Addressing Mode. Bits 13 and 12 indicate the addressing mode used by
the device:
0 0 A16/A24 address mode
0 1 A16/A32 address mode
1 0 RESERVED
1 1 A16 address mode
The Agilent E1446 amplifier uses the A16 address mode.
Manufacturer ID. Bits 11 through 0 identify the manufacturer of the
device. Agilent Technologie’s ID number is 4095, which corresponds to
bits 11 - 0 being set to “1".
Given the device classification, addressing space, and manufacturer of
the Agilent E1446, reading the ID register returns FFFF
16
.
The Device Type
Register
The Device Type register contains a model code which identifies the
device.
Address 1514131211109876543210
base + 02
16
Model Code
Model Code. The model code of the Agilent E1446 amplifier is 01A3
16
.
The READ/WRITE
Registers
The following READ/WRITE registers are located on the amplifier.
• Status/Control Register (base + 04
16
)
• DAC Control Register (base + 08
16
)
• Output Control Register (base + 0A
16
)
• Input Attenuation Register (base + 0C
16
)
Examples and program statements in this appendix use 16-bit reads and
writes.
Register Descriptions Register-Based Programming C-7