Configuration Of Low Voltage/Cpu Operating Detection Reset Circuit - Fujitsu F2MCTM-16LX Hardware Manual

CHAPTER 19 LOW VOLTAGE DETECTION/CPU OPERATING DETECTION RESET
19.2 Configuration of Low Voltage/CPU Operating Detection
Reset Circuit
Low voltage/CPU operating detection reset circuit has following three blocks.
• CPU operating detection circuit
• Voltage comparison circuit
• Low voltage/CPU operating detection reset control register (LVRC)
Block Diagram of Low Voltage/CPU Operating Detection Reset Circuit
Figure 19.2-1 Block Diagram of Low Voltage/CPU operating Detection Reset Circuit
CPU operating detection circuit
Oscillation clock
Counter
374
F/ F
OF
Clear
Reserved Reserved Reserved Reserved
Internal data bus
V
CC
Voltage comparison
circuit
-
+
Fixed voltage supply
Noise canceler
CL LVRF
Reserved
Low voltage/CPU operating detection
reset control register (LVRC)
V
SS
Internal reset
CPUF