Western Digital WD51
The WO-51 is a single-chip controller preprogrammed to operate a 6 station irrigation system. It is implemented using P-channel silicon gate MOS/LSI technology and requires minimal support circuitry.| Part No. | WD51 |
|---|---|
| Datasheet | WD51 Download |
| Manufacturer |  Western Digital |
| Description | IRRIGATION CONTROLLER |
| Buy | Stock & Price |
FEATURES
● CONTROLS UP TO 6 IRRIGATION STATIONS● PUMP CONTROUMASTER VALVE OUTPUT
● USER PROGRAMMABLE FOR UP TO 3 WATERING CYCLES DURING A 24 HOUR DAY
● USER PROGRAMMABLE RUN TIMES OF 1 TO 99 MIN- UTES FOR EACH STATION
● USER SELECTION OF WATERING DAYS OF 0 TO 7 DAYS PER WEEK
● TIME OF DAY AND DAY OF WEEK CONTINUOUSLY DISPLAYED o RAIN INHIBIT MODE o EASY TO DESIGN IN oco 0..>.. Ii
GENERAL DESCRIPTION
::l CI Preprogrammed Controller for IrrigationAPPLICATIONS
. ~ All program and data storage are on●chip, as well as input switch matrix scan, 7 segment display decode and drive, and output control logic. FUNCTIONALDESCRIPTION
The logic symbol and block diagram of the WO-51 is shown in Figure 1. ROM SCAN INPUTS CPU FIGURE 1 BLOCK DIAGRAM , 463 CONTROL OUTPUTS SCAN OUTPUTS SYMBOL VSS VDD SegA,B,C, D,E,F,G --RESET INO, 1N1, 1N2, 1N3 STN 1,2,3, 4,5,6 PUMP 60HZ 50HZ DMUX DO-D7 PINDESCRIPTION
PIN NO. FUNCTION 1 20 2●6,39●40 8 12●15 Positive Supply voltage Negative Supply voltage Decoded 7-Segment Multiplexed outputs, 15 mA source.
