ocr: 1581 SERVICE MANUAL WD1770 FLOPPY DISK CONTROLLER CS 1 28 FINTRO R/W 2 27 EDRO AO 3 26 - DDEN A1 4 25 WPRT DALO - 5 24 HP DAL1 6 23 TROO DAL2 7 22 -WD DAL3 8 21 EWG DAL4 9 20 -MO DAL5 10 19 HI RD DAL6 11 18 - CLK DAL7 12 17 - DIRC MR- - 13 16 STEP GND 14 15-VCC 1 CS CHIP SELECT A logic low on this input selects the chip and enable Host communication with the device. 2 R/W READ/WRITE A logic high on this input controls the placement of data on the DO-D7 lines from a selectcdregister, while a logic low causes a write operation to a selected register. 3.4 AO.A1 ADDRESS 0,1 These two inputs select ...
