2/Theory of Operation
2-15
together provide a regulated output with high current sinking
capability. Typical current seen by these regulators can vary from 10 to
40 mA. The approximate VHI and VLO levels generated are listed in Table
2-3.
Table 2-3. VHI and VLO for TTL and CMOS Logic Levels
_____________________________________________________________
DESC THRSH VHI VLO
_____________________________________________________________
TTL 1 -1.05V -2.45V
CMOS 0 -0.25V -2.25V
_____________________________________________________________
A voltage level-detection system in the custom chip uses data inputs,
VHI, and VLO voltage levels to detect a high voltage input, a low
voltage input, or a tri-state condition. See Figure 2-8 for an
illustration of the detection circuitry contained in the custom chip.
NOTE
The actual input thresholds for the high and low
comparators are computed from the formulas shown
in Figure 2-8.
Figure 2-8. Custom Chip Voltage Level Detection
Multi-Detection and Interrupt
The Vector Output I/O Module accepts different sizes of clip modules. A
detection system within the module informs the mainframe as to the size
of the clip that has been installed on the module. Clip modules are
available in a half-size module and a full-size module. The half-size
module plugs into one connector (either J1 or J2 on the Top PCA), and
Summary of Contents for 9100 Series
Page 6: ... iv ...
Page 8: ... vi ...
Page 15: ...2 Theory of Operation 2 3 Figure 2 1 Input Section Functional Block Diagram ...
Page 16: ...2 Theory of Operation 2 4 Figure 2 2 Output Section Functional Block Diagram ...
Page 19: ...2 Theory of Operation 2 7 Figure 2 3 Input Section Address Decoding Summary ...
Page 42: ...2 Theory of Operation 2 30 ...
Page 50: ...4 List of Replaceable Parts 4 2 ...
Page 54: ...4 List of Replaceable Parts 4 6 Figure 4 1 9100A 017 Final Assembly ...
Page 55: ...4 List of Replaceable Parts 4 7 Figure 4 1 9100A 017 Final Assembly cont ...
Page 57: ...4 List of Replaceable Parts 4 9 Figure 4 2 A1 Main PCA ...
Page 59: ...4 List of Replaceable Parts 4 11 Figure 4 3 A2 Top PCA ...
Page 64: ...4 List of Replaceable Parts 4 16 ...
Page 66: ...5 Schematic Diagrams 5 2 ...
Page 67: ...5 Schematic Diagrams 5 3 Figure 5 1 A1 Main PCA ...
Page 68: ...5 Schematic Diagrams 5 4 Figure 5 1 A1 Main PCA cont ...
Page 69: ...5 Schematic Diagrams 5 5 Figure 5 2 A2 Top PCA ...
Page 70: ...5 Schematic Diagrams 5 6 Figure 5 2 A2 Top PCA cont ...
Page 74: ...Index Index 4 ...