Double-d trigger circuit, which is composed of two D-type flip-flops with Set and reset. The information applied to the D input is read in at a low level of the clock pulse and transmitted at a high level to the output Q. Pin main function Pin main function 1 Data out 18 Set in 2 2 Data out 19 data in 2 3 clock in 110 Clear in 4 clear in 11 clock in 2 5 Data in 112 data out 2 6 Set in 113 data out 2 7 Power supply ground 14 Power supply is not a single chip microcomputer, nor does it exist in any programming language.