The Read Registers; The Id Register - HP E1326B User Manual

The READ Registers

The ID Register

Address
base + 00
16
Appendix C
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The following READ registers are located on the multimeter.
ID Register (base + 00
–
Device Type Register (base + 02
–
Status Register (base + 04
–
Query Response Register (base + 08
–
Data Buffer (base + 0C
–
The multimeter's ID Register indicates the classification, addressing mode,
and the manufacturer of the device.
15 14 13
Device Address
Class Mode
Device Classification. Bits 15 and 14 classify the device:
0 0 memory device
0 1 extended device
1 0 message-based device
1 1 register-based device
The HP E1326B/E1411B multimeter is a register-based device.
Addressing Mode. Bits 13 and 12 indicate the addressing mode:
0 0 A16/A24 address mode
0 1 A16/A32 address mode
1 0 RESERVED
1 1 A16 address mode
The HP E1326B/E1411B multimeter uses the A16 address mode.
Manufacturer ID. Bits 11 through 0 identify the manufacturer of the
device. Hewlett-Packard'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
HP E1326AB/E1411B multimeters, reading the ID Register returns FFFF
The "Programming Examples" section on beginning on page 220 shows
how to read the ID Register.
HP E1326B/E1411B Multimeter Register-Based Programming
)
16
)
16
)
16
16
)
16
12
Manufacturer ID
)
11 - 0
16
205
.