HP E1340A User's Manual
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Device Classification. Bits 15 and 14 classify a device as one of the
following:
0 0 memory device
0 1 extended device
1 0 message-based device
1 1 register-based device
The HP E1340 Arbitrary Function Generator is a register-based device.
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 HP E1340 AFG 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 E1340 AFG, reading the ID register returns FFFF
16
.
The Device Type
Register
The Device Type Register contains a model code which identifies the
device.
Address 15 14 13 12 11 10 9 8 7 6543210
base + 02
16
Model Code
Model Code. The model code of the HP E1340 AFG is FFA0
16
.
Appendix C HP E1340A Register-Based Programming 235