I have a uP based system I am working on. I need to implement registers external to the uP to control various devices and set modes.
Normally I do this with an octal latch (like 74573) and a bus transceiver.
74573 input and 74245 output are connected together and to the system bus 74573 output and 74245 input are connected together and to the device to be controlled. address decode logic will drive 74573 clk/le and 74245 oe\\Thats how I normally do read/write registers on the board.
But heres my delima Ive got a stock of 74ALS646 and their datasheet. They are 8 bit bus transcievers with dflops on both buses (A and B).
For the life of me I cant configure them to function as 8 bit read/write registers. It would be great since I have a lot of these and they will replace two chips from above configuration
anyone here have an experience with these chips (74ALS646)?