HP E1340A, User Manual

Page: 238 / 295

The Command and
Parameter Registers
Commands and parameters are opcodes or data bytes written to the
Command and Parameter Registers.
Address 15 - 8 7 6 5 4 3 2 1 0
base + 08
16
not used Command Opcode
Address 15 - 8 7 6 5 4 3 2 1 0
base + 0A
16
not used Parameter Byte
Command Format. A command consists of an opcode written to the
Command Register, plus zero to six parameters written to the Parameter
Register. A command opcode written to the Command Register might
appear as:
8,1
where "8" is the offset of the Command Register and "1" is the opcode. A
parameter might appear as:
10,128
where "10" is the offset of the Parameter Register and 128 is the value of
the parameter byte.
The AFG commands and parameters are covered in the section “ Command
Descriptions and Formats” . The sequence and timing involved in sending
commands are covered in the section “Program Timing and Execution” .
The Input Data
Register
The Input Data Register is used to download amplitude points to RAM or
directly to the AFG DAC.
Address 15 - 12 11 10 9 8 7 6 5 4 3 2 1 0
Base + 0C
16
Not Used Amplitude data
238 HP E1340A Register-Based Programming Appendix C