Operation - Omron H5CR Instructions Manual

H5CR

Operation

Block Diagram
I
Set
circuit
Key switch circuits
Input circuits (Re-
set, control signal,
key protect, gate)
AC (DC) input
DC input only for H5CR-S
* Power supply is not insulated from I/O.
I/O Functions
I
Inputs Start signal
Reset
Gate
Key protect
Outputs Control output (OUT)
LCD drive System clock
clock generator generator
ROM RAM
Control
circuits
Battery
Power circuits *
Stops timing in A-2 and A-3 (power on delay) modes. Starts timing in other modes.
Resets present value (to zero in UP modes, to preset in DOWN mode).
Count inputs are not accepted while reset input is ON.
Reset indicator lit while reset input is ON.
Inhibits timer operation.
Makes keys inoperative according to key protect level.
Key protected indicator lit while key protect input is ON.
Effective when power supply is turned off.
Effective when protect terminals are shorted.
Outputs made according to designated output mode when corresponding preset is reached.
LCD reference
voltage generator
LCD driver
One-chip
microcom-
puter
Output circuits
(OUT)
Power outage
detector
H5CR
LCDs
5