GE Corometrics 170 Series

Revision C 170 Series Monitor 5-21
2000947-004
Theory of Operation: Main Board Theory of Operation
Figure 5-12. PAL Block Diagram
System Flash ROM
Decoder Bank 1
Recorder Control
Decoder and Latch
 Head strobes
 Head supply control
 Head protection
System Flash ROM
Decoder Bank 2
Recorder Control
Latch Decoder
Motor phase latches
General Decoder and Latch
 SPI (serial peripheral
interface) chip selects
 Front-end/telemetry control
Battery RAM/RTC Decoder
Status Port Decoder
 Front panel buttons
 Recorder status
Display Decoder
UART Decoder
Recorder Printhead
Data Shift Register
Processor
Address/Data
and Control