2/Theory of Operation
2-13
the module Main PCA protects the ground line. The FUSEDET signal
becomes an input to the interrupt register (U13-8), along with the other
detection signals.
DATA COMPARISON AND GENERAL INTERRUPTS
The General Control Latch block outputs detection and interrupt signals
for any problems or special operations of the module. An external DCE
pin is also available for use as a “hardware interrupt”.
The following two interrupts are produced by the General Control Latch
block:
o DCEINT- (Data Compare Equal Interrupt).
o IOGENINT- (I/O General Interrupt).
The Data Compare Interrupt
DCEINT- is generated by the module when the programmed data compare
registers match the input data. The DCEINT- signal originates from the
EQ pin of each custom chip. The EQ signals are gated to form a DCE-
signal. The DCE- signal triggers a J-K flip-flop to produce the DCEDET
and DCEINT- signals.
The I/O General Interrupt
IOGENINT- is an interrupt generated by the module when either pushbutton
on a clip module is pressed. The interrupt register on the module must
be read to determine the cause. In the case of a button push, two J-K
flip-flops output the SWLDET (A side) and SWRDET (B side) signals. These
signals are gated to produce the IOGENINT- signal.
DATA COMPARE EQUAL OUTPUT PIN
DCE output pin P1-6 can be used to trigger a logic analyzer or
oscilloscope. Buffers and protection circuitry safeguard the DCE signal
output.
OPERATION OF GENERAL CONTROL LATCH BLOCK
The General Control Latch block is divided into three areas. These areas
produce voltages for module operation and contain circuitry that
generates detection for a blown fuse. The functional block contains the
following areas:
o Threshold Voltage Detection.
o Multi-Detection and Interrupt.
o Fuse Blown Detection.
Summary of Contents for 9100 Series
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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 ...