Operation; Block Diagram - Omron H5BR Series Manual

H5BR

Operation

Block Diagram

Setting circuit
Key switch circuits
Input circuits (Re-
set, control signal,
batch count reset,
key protect, gate)
AC (DC) input
External power supply
* Power supply is insulated from I/O.
I/O Functions
Inputs Start signal
Reset
Gate
Batch count reset
Key protect
Outputs Control output (OUT)
Batch output
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.
Resets batch count to zero and batch output turns OFF on leading edge.
Batch count signals are not accepted while batch count reset is ON.
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.
Outputs made when batch count equals the preset number of batches.
Batch output remains ON until batch count reset goes ON.
When the number of batches is set to zero, batch counting is performed but batch outputs are
not made.
LCD reference
voltage generator
LCD driver
One-chip
microcom-
puter
Output circuits
(OUT, batch output)
Power outage
detector
H5BR
LCDs
5