HP 1650B User Manual

DATA
State Data
(without tags)
177
191
205
14499
State Data (with either Status Bytes. In state tagging mode, the tags indicate whether a given row
time or state tags) of the data is a data line, a count (tag) line, or a prestore line.
System Commands HP 1650B/HP 16518
612 Programming Reference
Status Bytes. In normal state mode, only the least significant bit (bit 1) is
used. When bit 1 is set, this means that there has been a sequence level
transition.
Information Bytes. In state acquisition with no tags, data is obtained from
the target system with each clock and checked with the trace specification.
If the state matches this specification, the data is stored, and is placed into
the memory.
Machine 1 Machine 2 Pod 5 Pod4 Pod 3 Pod 2 Pod l*
Status Status Data Data Data Data Data
Status Status Data Data Data
Data Data
Status Status Data
Data Data Data Data
Status Status Data Data Data
*The headings are not a part of the returned data.
Data Data
Bit 2 is the Data vs. Count bit. Bit 3 is the Prestore vs. Tag bit. The two
bits together show what the corresponding Information bytes represent.
Bit 3
Bit 2 Information bvte reoresentz
0 0 Acquisition Data
0 1 Count
1 0 Prestore Data
1 1 Invalid
If Bit 2 is clear, the information contains either actual acquisition data as
obtained from the target system (if Bit 3 is clear), or prestore data (if Bit 3
is set). If Bit 2 is set and Bit 3 is clear, this row’s bytes for the pods
assigned to this machine contain tags. If Bit 2 and Bit 3 are set, the
corresponding Information bytes are invalid and should be ignored. Bit 1
is used only when Bit 2 is clear. Whenever there has been a sequence level
transition Bit 1 will be set, and otherwise will be clear.

HP 1650B Specifications

General

Brand	HP
Model	1650B
Category	Measuring Instruments
Language	English